The SXK 4.51 MTL RTA clone Rebuildable Tank Vape Atomizer is made from 316 Stainless Steel in 22mm diameter and PMMA tank tube holds 4.51ml. The SXK 4.51 RTA clone is with single coil deck and airflow from the bottom to the coil. The 4.51 RTA is with convenient top refilling system. More info 4.51 MTL RTA clone By SXK 510 threading connection MTL RTA atomizer 316 stainless steel PMMA tank tube: Tank capacity: 4.51ml Air adjustment ring with holes of: 1mm / 1.2mm / 1.4mm / 1.6mm / 1.8mm / 2mm Diameter: 22mm QUICK LINK,Click Here>>https://www.3fvape.com/57238-.html