This is the glass tube replacement for QP Design Juggerknot V2 28mm RTA 5.5ml, if your tank glass is broken and want to find the replacement, this is the best one for you. Cheap price , free shipping with tracking number, original factory with high quality, 3PCS QP Design Juggerknot V2 28mm RTA 5.5ml replacement glass is just $8.99, you can also add 2 USD for another 3pcs, don't miss this great deal.