For use with the Mighty and Crafty vaporizers, this set of 4 replacement mouthpieces fit onto the devices cooling unit. Whether you need some replacements or want some spares, these are a great spare part to have for your Mighty or Crafty vaporizer. They are also a great accessory to have when sharing your device with friends to keep clean and hygienic. Each mouthpiece comes with a seal and is made out of Storz & Bickels famous heat resistant, medical grade plastic. Over time and use, mouthpieces can become worn and you may notice a drop in the quality of the vapor and flavour. When you notice this happen, grab one of these replacement mouthpieces, attach to your device and you will be good to go!