The Dvarw RTA is a rebuildable tank atomizer for advanced users, you have to build the coils yourself. designed and made in Hungary metal parts are made of stainless steel real 5ml capacity tube is tough polycarbonate, only few plastic cracker eliquids will kill it. Please avoid strong citrusy, natural banana, cinnamon, elder blossom, etc. flavours. MTL tank for the mouth to lung inhalers comes with 1.2mm AFC insert, 1,5-2,0-2,5mm can be bought as an extra set. Leaving the AFC allows 3,1mm air and tight direct lung inhale small size: 22x38mm without drip tip 43g weight individual serial numbers easily filled from bottom In the package you will find: Dvarw MTL RTA 5ml version with 1,2mm airflow insert 510 compatible teflon drip tip spare O-rings and screw (1pc), hex key 2ml tank for the Dvarw MTL RTA is available as an extra.