The Back 2 Basics v4 Mech MOD is the reiteration of Purge Mods’ acclaimed and beloved B2B V3, the affordable all-purpose mechanical vaping platform designed to push your cloudage, not your wallet. Borrowing many facets from the previous version, the B2B V4 has a solid naval brass chassis broken only by the 510 threading, firing switch, and an impressively etched signature Purge skull logo. The proprietary magnetic Purge firing switch is the same high performance enabler that comes in every Purge mech mod, endowing this mech the incredible performance Purge Mods is known for. The Back 2 Basics v4 can accept 20700 and 21700 battery cells as well as 18650s by using the included delrin battery adapter.