Freemax GEMM Disposable Tank

The Freemax GEMM Disposable Tank takes a different approach to sub-ohm tank maintenance. Instead of building the tank around a coil that needs to be removed and replaced separately, GEMM combines the coil and tank into a single refillable unit. Once performance eventually declines, the complete tank can be replaced.

That makes GEMM particularly interesting for adult users who want sub-ohm performance without regularly disassembling a conventional tank to install replacement coils.

Inside, Freemax uses its Diamond Mesh structure together with a specialized cotton blend made from 90% tea fiber cotton and 10% organic cotton. The tank also features 360-degree e-liquid feeding, a simple top-fill system secured by a silicone plug, and a PCTG reservoir supported by stainless steel components.

Two coil configurations are available: the G1 0.15Ω Single Mesh Coil for wattage-based operation and the G1 SS316L 0.12Ω Single Coil for compatible temperature-control setups.

Freemax GEMM Disposable Tanks are sold in packs of two.

Disposable Tank Design Without Giving Up Refilling

The word "disposable" can be slightly misleading if you're expecting a sealed, single-use tank.

The Freemax GEMM is refillable.

Its disposable design refers to the integrated tank-and-coil construction. Rather than keeping the tank and installing a new coil when the old one is finished, the entire GEMM tank is eventually replaced as one unit.

Until then, the 5mL/4mL reservoir can be refilled through the top filling system.

This approach removes several steps associated with a traditional rebuildable or replaceable-coil tank. There's no separate coil head to unscrew from the base and no need to disassemble multiple tank sections each time a coil needs changing.

The basic routine is straightforward:

• Open the designated top-fill port

• Add compatible e-liquid to the reservoir

• Secure the silicone plug after filling

• Allow a new tank adequate time for the cotton to saturate

• Use the tank within the appropriate range for its integrated coil

• Refill as necessary during its usable life

• Replace the complete tank when coil performance has noticeably declined

Freemax states that a GEMM tank can go through approximately 30 to 40 tankfuls before flavor becomes muted. Actual lifespan can vary considerably according to e-liquid, power level, frequency of use, and individual vaping habits, so this figure should be treated as a manufacturer estimate rather than a guaranteed service life.

Diamond Mesh Structure for Consistent Heating

The G1 0.15Ω version uses Freemax's Diamond Mesh structure.

Instead of a conventional round-wire heating element, the mesh creates a broader heating surface. Freemax designed this structure to improve the balance between heating and e-liquid delivery, supporting a full and consistent flavor profile.

Mesh performance also depends heavily on keeping the wicking material properly supplied with e-liquid. GEMM addresses this with 360-degree e-liquid feeding, allowing liquid to reach the internal wicking structure around the coil.

Together, these elements create the core of the GEMM design:

• Diamond Mesh heating structure

• Broad heating surface

• Integrated coil construction

• 360-degree e-liquid feeding

• Specialized tea fiber and organic cotton blend

• Refillable reservoir

• Sub-ohm resistance

• Replaceable complete-tank format

The system is intended to provide the performance expected from a sub-ohm configuration while simplifying the maintenance normally associated with a reusable tank and separate replacement coils.

90% Tea Fiber Cotton and 10% Organic Cotton

One of the more distinctive features inside the Freemax GEMM Disposable Tank is its wicking material.

Freemax uses a patented blend consisting of 90% tea fiber cotton and 10% organic cotton. According to the manufacturer, the tea fiber component is derived from natural tea leaves and is used as part of the tank's flavor-focused wicking system.

The purpose of the blend is to work alongside the Diamond Mesh structure and maintain efficient e-liquid delivery to the heating element.

Wicking material has an important job in any sub-ohm tank. It needs to absorb e-liquid and keep the heating surface adequately supplied during operation. If the wick becomes too dry while the coil is heated, performance can deteriorate and the material can develop a burnt taste.

That's why a new GEMM tank should be properly saturated before its first use.

After filling a fresh tank, allow enough time for e-liquid to reach the cotton before firing the device. Follow the manufacturer's instructions rather than immediately operating a newly filled tank at higher power.

The 360-degree feeding structure is designed to continue supplying e-liquid throughout normal use, but keeping an adequate amount of liquid in the reservoir remains important.

G1 0.15Ω Single Mesh Coil

For standard wattage-based operation, the G1 Single Mesh Coil configuration uses a resistance of 0.15Ω.

Freemax rates this version for 40W to 80W, with a stated best setting of approximately 70W.

G1 0.15Ω specifications:

• Coil type: G1 Single Mesh Coil

• Resistance: 0.15Ω

• Recommended range: 40W-80W

• Manufacturer's stated best setting: 70W

• Heating structure: Diamond Mesh

• Configuration: integrated coil and tank

• Intended operation: compatible wattage-based devices

• Tank style: refillable disposable sub-ohm tank

A compatible vape mod needs to be capable of safely operating the 0.15Ω coil within the recommended range.

There's no requirement to immediately start at the manufacturer's stated 70W preference. When using a fresh tank, following the device and tank manufacturer's setup recommendations and working within the rated range allows you to find the appropriate setting for your setup.

Do not exceed the specified operating range simply to produce more vapor. More wattage isn't automatically better, particularly when it falls outside the coil's intended specifications.

G1 SS316L 0.12Ω Single Coil

Freemax also offers a G1 SS316L Single Coil version with a resistance of 0.12Ω.

This option is designed around stainless steel SS316L and is specified for compatible temperature-control operation.

G1 SS316L specifications:

• Coil type: G1 SS316L Single Coil

• Coil material: SS316L stainless steel

• Resistance: 0.12Ω

• Temperature range: 400°F-550°F

• Manufacturer's stated best temperature: 500°F

• Configuration: integrated coil and tank

• Tank type: refillable disposable sub-ohm tank

The key difference here is how the setup is controlled.

Instead of selecting a conventional wattage setting in the same manner as the G1 0.15Ω mesh option, the SS316L version is intended for an appropriate temperature-control configuration on a compatible mod.

Not every vape mod supports SS316L temperature control, and not every temperature-control mode is configured identically. Confirm that your device supports the required mode and follow its operating instructions before using this version.

The manufacturer's specified temperature range is 400°F to 550°F, with 500°F identified as the preferred setting.

5mL/4mL Capacity With Easy Top Filling

Despite its simplified disposable-tank construction, GEMM is designed to be refilled throughout its usable life.

Depending on the version, the tank has a listed e-liquid capacity of 5mL or 4mL.

Refilling is handled from the top and the filling opening is sealed with a silicone plug. This avoids the need to remove the tank from the mod every time the reservoir needs more e-liquid.

For cleaner refilling:

• Keep the tank upright whenever practical

• Open the correct top-fill port

• Add e-liquid slowly rather than forcing it into the reservoir

• Avoid overfilling

• Close the silicone plug securely

• Wipe away any excess e-liquid before use

• Check the reservoir regularly and refill before the wick becomes excessively dry

• Give a newly filled fresh tank enough time to saturate before first use

These are small steps, but they're particularly relevant to an integrated-coil tank because the coil cannot simply be removed and replaced independently if its wick is damaged.

Compact 25mm Sub-Ohm Tank Format

GEMM has a diameter of 25mm and a height of 51.35mm, creating a relatively compact profile for a refillable sub-ohm tank.

The body combines stainless steel with PCTG.

Freemax GEMM Disposable Tank specifications:

• Diameter: 25mm

• Height: 51.35mm

• E-liquid capacity: 5mL/4mL

• Materials: stainless steel and PCTG

• Filling system: top fill

• Fill-port closure: silicone plug

• E-liquid feeding: 360-degree feeding system

• Coil construction: built-in

• Wicking formula: 90% tea fiber cotton and 10% organic cotton

• Tank type: refillable disposable sub-ohm tank

• Available coil options: G1 0.15Ω Mesh and G1 SS316L 0.12Ω

• Package quantity: 2 tanks

Before pairing GEMM with a vape mod, check the physical fit as well as electrical compatibility.

A 25mm tank should sit appropriately on the device without interfering with other components. More importantly, the mod must be capable of safely supporting the resistance and operating requirements of the selected GEMM version.

G1 0.15Ω vs G1 SS316L 0.12Ω

The two GEMM options shouldn't be treated as interchangeable coils with a small resistance difference. They are intended for different operating approaches.

Choose based on your compatible device and the mode you intend to use.

G1 0.15Ω Single Mesh

This version is the more straightforward choice for conventional wattage operation.

Key details include:

• 0.15Ω resistance

• Diamond Mesh structure

• 40W-80W rated range

• 70W manufacturer-stated best setting

• Designed for compatible wattage-controlled vape mods

• Integrated mesh coil

• Refillable disposable-tank construction

G1 SS316L 0.12Ω Single Coil

This version is intended for compatible temperature-control hardware.

Its key characteristics include:

• 0.12Ω resistance

• SS316L construction

• 400°F-550°F temperature range

• 500°F manufacturer-stated best setting

• Designed for appropriate temperature-control operation

• Integrated coil

• Refillable disposable-tank construction

If your mod doesn't support the required SS316L temperature-control functionality, don't select the SS316L option based only on its lower resistance.

Compatibility should determine the choice.

Why Choose a Freemax GEMM Disposable Tank?

GEMM occupies an interesting middle ground between a conventional refillable sub-ohm tank and a more simplified integrated system.

You still get a refillable e-liquid reservoir and a sub-ohm coil, but coil replacement doesn't require taking the tank apart. When the integrated coil is eventually finished, the entire tank is replaced.

That design may appeal to adult users who want:

• A refillable sub-ohm tank

• Built-in coil construction

• No separate replacement coil installation

• Diamond Mesh technology

• 360-degree e-liquid feeding

• A top-fill system

• 5mL/4mL capacity options

• Specialized tea fiber and organic cotton wicking

• Wattage or SS316L options depending on the selected tank

• Two tanks per package

• A 25mm format for compatible vape mods

It also means buyers should understand exactly what they're purchasing. GEMM is a tank with a built-in coil, not a complete vape kit. A compatible mod and other required components are not automatically included unless specifically stated in the product listing.

Shop Freemax GEMM Disposable Tank 2 Pack

The Freemax GEMM Disposable Tank 2 Pack provides two refillable replacement tanks built around integrated coil technology.

Choose the G1 0.15Ω Single Mesh version if you're looking for the specified 40W-80W wattage range and Diamond Mesh construction. For compatible temperature-control devices, the G1 SS316L 0.12Ω version offers a specified operating range of 400°F-550°F.

Both options maintain the simplified GEMM concept: refill the tank during its usable life, use the integrated coil within its specified operating parameters, and replace the complete tank when performance has reached the point where replacement is necessary.

With stainless steel and PCTG construction, 360-degree e-liquid feeding, top filling, specialized cotton wicking, and two tanks in every pack, GEMM offers a different route to maintaining a compatible sub-ohm setup without traditional standalone coil changes.

Vaping products are intended only for adults of legal purchasing age. If the e-liquid used in the tank contains nicotine, nicotine is addictive. Always use the tank with compatible hardware, follow the manufacturer's operating recommendations, and keep vaping products and e-liquid securely away from children and pets.