The Innokin iSub vape coils are designed to be used with the iSub vape tank series, including the Innokin iSub vape tank and the Innokin iSub G vape tank. The high-quality vape coils feature Innokin's signature 'no spill coil swap system', meaning due to the iSub coil's built-in 510 pin, by simply unscrewing the base of your tank you can pull the coil straight out and replace it.