High Quality: Made of stainless steel material, stronger and last longer, sturdy and perfect polishing, it is used longer and easier than ever to carbonate your drinks! Carbonation tool Cost effective: Use it to counter PET bottles, ball fittings (grey) or liquid ball fittings (black), more portable, convenient and cheaper than CO2 systems Used Easily: Attaches to plastic bottles and connects to a gas side ball breaker to inject CO2 into the bottle, creating carbonation, your beer is available to drink almost immediately. Various Use: Carbonation caps can carbonate a number of beverages including beer, soda, water, and juice, also can clean up your beer line and counter pressure bottle filling Product Description Material: 304 Stainless Steel Weight: 3.5-3.6oz Include: 1 carbonation cap piece The post on this unique carbonation cap has been machined, so it fits both liquid and gas ball lock disconnects. For best results, make sure your drink is very cold so the CO2 can be absorbed much faster.