XL Zlide Top Bubble Glass Available to hold 4.5ml. Coolfire Z60 Mod. Zlide Top Tank. Spare Glass Tube. Spare Drip Tip. Pull the coil out from the base of the tank. Unscrew bottom ring. Screw the ring back onto the base of the tank (if your coil is not fully installed there will be a gap between the airfolw ring and the tank).