The 4Nine mod by Infinite is a spectacular 1:1 mechanical mod with a unique seamless modular tube design. By limiting as much space as possible, this mod is known to be one of the most compact mechanical in vaping. Made from copper, 2 additional extension tubes are included for various battery sizes (18350, 18500, 18650). You will also notice there is no center post present and instead, utilizes an innovative hybrid connection. The bottom firing button uses a magnetic switch mechanism for space reduction and longevity on the switch function versus a spring. Each 4Nine mechanical mod contains an engraved logo and is individually numbered.