Smoktech is on the cutting edge of Rebuildable Tank Technology and has pushed the limits with its TF-RTA G4 Rebuildable Tank Atomizer. Constructed of Stainless Steel and featuring a 4.5ml capacity glass tube, the Smok TF-RTA comes ready to build with a super big "deck-off-base" design that measures 16mm in diameter which is a 30% increase in build space from the TF-RCA deck. Smok's innovative Juice Flow Control System ensures this device wont leak. The Smok TF-RTA G4 comes equipped with Top-Fill mechanism and makes filling this tank easy and convenient. The double layered drip tip contains a heat shield and stays cool while vaping.