Description: Carbonation Cap With Gas Ball Lock Disconnect Counter Pressure Bottle Filling  Features: Made to fit PET bottles Fits gas and liquid ball lock disconnects Use to clean beer lines and save heaps on beer line cleaner Use to carbonate liquid、 such as: water、 beer、 soft drink and so on   Specifications: 1. Size: As the picture showed you 2. Material: Stainless Steel + Plastic 3. Color: As the picture showed you   Package include: 1 x Ball Lock 1 x Carbonation Cap