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Tarsius Prime Copper Mechanical Mod by Tarsius Customs #123

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Product Description

Tarsius Prime Copper Mechanical Mod by Tarsius Customs - 18650

Prime Copper Mechanical Mod by Tarsius Customs

NEW (1) Tarsus Customs Prime Copper # 123 LOW Serial 18650  Mod

Original First Run - Serial # is 123 

New but has a couple scratches around the bottom button ring, from opening it once the wrong way with a plier through a cloth.  Hard to see but it's there.

This is not with interchangeable 18350 18500 tubes, just a straight 18650.


The Prime Mod from Tarsius Customs is the follow-up to the amazingly small and popular 4nine Mod, and is one of the smallest 22mm mods on the market. Focused entirely on ease of use and minimalistic style, the Prime is one of the slickest and best mods we have ever used, and features a hybrid style top cap as well as a spring-driven recessed switch with lockout ring.

The brushed copper Prime Mod starts with an 18350 tube and uses extension rings for 18500 and 18650 battery compatibility. When all of the rings are used, the finish is so smooth that the extensions are barely noticeable. The copper top cap does not have a connection pin. Instead, the threads of the atomizer pass through the cap to make direct contact with the battery. This hybrid style connection ensures that the mod has very little voltage drop. The copper recessed switch is beautifully engraved with a Philippine Tarsier, one of the smallest primates known to man (and the company logo), as well as a serial number.

Due to the hybrid style top cap, the length of your atomizer’s threads will determine if you need to use flat top or button top batteries with the 4nine. Atomizers with longer threads will work better with flat top batteries. Atomizers with shorter threads may require that you use button top batteries.


  • Copper hybrid style 510 threaded top cap
  • Copper 18350 tube with 18500 and 18650 extension rings
  • Engraved copper firing switch with spring and lockout ring
  • Tarsius Customs box with matching serial number
  • Made in the Philippines


Authentic Serialized Prime Mod by Tarsius Customs, the makers of the 4Nine Mod from the Philippines.

Package includes The Prime Mod and 2 extension tubes to accommodate the 3 main battery sizes.


  • Comes in 3 finishes: Brass, Stainless Steel, and Copper
  • 18650, 18490, and 18350 compatible
  • Extension rings/tubes
  • Seamless Modular High Quality 304 Grade Tube
  • Custom hybrid top connection
  • Serialized

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