This variable voltage thick oil vape has all the functionality you've come to expect, including 4 heat setting and 15-second pre-heat function, unique features like a magnetic magazine cartridge loading system, and the ability to fire your 510 carts independently or simultaneously for big hits. Put twice the power in your pocket with the new DuploCart! This variable voltage thick oil vape has all the functionality you've come to expect, including 4 heat setting and 15-second pre-heat function, unique features like a magnetic magazine cartridge loading system, and the ability to fire your 510 carts independently or simultaneously for big hits. Put twice the power in your pocket with the new DuploCart!