The SXK Unkwn Enigma Style RTA is made from 316 stainless steel and PCTG Tank in 22mm diameter. The Single coil deck RTA comes with 5 PCS Air pins: 1.5mm + 2.5mmm (pre-installed) + 3mm + 3.5mm + 4mm. Replacement Tank Tube: 3FVAPE Recommend Products: Learn More