My last mod. Made from Stainless Steel. Work with one 18650 or two RCR123a battery for 3,7V and 6v+ vaping. Head and end cap is from brass and can be from Stainless Steel too. On the body has laser etched name. The switch has round ss cap and inside is 2A microswitch. The dimension is 110mmx22mm. I use it two weeks and that's real "steam machine". I hope you like it.

