Various connection ways for you to choose from:
Improve the consuming amount of vaping cartridges
The mouthpiece only can be opened when pressing and screwing at the same time.
510 thread connection way allows you to screw your oil tank via a threaded connection
Offer more optional choices for connection and sealing
With Transpring cartridges, you can choose between a standard 510 threaded connection, self-lock, child-proof connection