The  ShenRay Congestus Style Mechanical Mod is so amazing as it has a huge size and is powered by 1 x 26650 battery or 2 x 26650 batteries with extended tube (batteries not included). The 510 connection can even support atomizer that is 32.5mm in diameter (maximum). Instead of regular bottom fire button, the Congestus uses spring fire button on the side, which is removable. In order to garantee the battery safe, the bottom cap comes with several venting holes and the top hat comes with 4 air inlets and air sink

Price: $28.99

Specifications:

Huge size mechanical mod;
Stainless steel construction with brass contacts;
510 threading connection;
Diameter: 32.5mm;
Removable spring fire button on the side;
Bottom venting holes;
Top air sink and inlets;
Brass battery contacts;
Powered by 1 / 2 x 26650 batteries (not included)
With logo and pattern on the mod

Package:

1* Mechanical Mod, 
1* Removable Fire Button