To utilize a cart pen and THC cart, the user just screws the THC cart onto the pen. The moment connected, the pen heats up the oil from the cartridge, both via a button push or by drawing around the mouthpiece, depending upon the product. Controlled Vaporization: Lots of THC https://buythccartsonline84045.jts-blog.com/31750012/the-fact-about-buy-cartridges-that-no-one-is-suggesting