This Empire Glassworks joystick cap is great for those who own a PuffCo Peak Pro and want to enhance their experience. Whether you're using it at home for a relaxing session or sharing with friends, it'll be a great addition. It's an art piece hand - crafted for individuals who appreciate quality. The cap is made for the PuffCo 3D XL Chamber (sold separately). It has an extended length of about 26.5 mm (give or take.5 mm), which helps with better air distribution.