Versatile 904L X Series Mesh Coils from FreeMax are compatible with the MaxLuke Tank, FireLuke 3 Tank, FireLuke 2 Tank, and the FireLuke M Tank. Upgraded from COILTECH 1.0, 2.0, and 3.0, the COILTECH4.0 is the latest generation of mesh coil technology and maybe the final generation of MESH. Equipped with military grade SS904L mesh and Tea Fiber Cotton formula (95% Tea Fiber Cotton plus 5% Organic Cotton), these coils are able to provide you with the best vaping experience which is even better than all the best sub ohm tanks in the market.