Features 1.The carbonation cap is made from 304 stainless steel material, and it is a highly effective method to add and maintain carbonation in beverages for extended periods of time. 2.This carbonation cap is a screw‑on cap with an integrated Cornelius ball lock fitting. 3.It is designed to fit onto most soft drink PET bottles. 4.With this cap you can simply fill an old PET bottle with cold liquid of your choice and carbonate by connecting your Liquid ball lock disconnect. 5.Making your own soda water, carbonate beer, or even making your own soft drinks. Specification Our carbonation cap is made of 304 stainless steel material and liquid ball lock is made of high-quality plastic material, sturdy and durable to use. With this cap you can simply fill an old PET bottle with cold liquid of your choice and carbonate by connecting your Liquid ball lock disconnect. It is designed to fit most soft drink PET bottles. So you could make your own soda water, carbonate beer or other soft drinks, easy and convenient. Features: The carbonation cap is made from 304 stainless steel material, and it is a highly effective method to add and maintain carbonation in beverages for extended periods of time. This carbonation cap is a screw-on cap with an integrated Cornelius ball lock fitting. It is designed to fit onto most soft drink PET bottles. With this cap you can simply fill an old PET bottle with cold liquid of your choice and carbonate by connecting your Liquid ball lock disconnect. Making your own soda water, carbonate beer, or even making your own soft drinks. Specification: Condition: 100% Brand New Material: Stainless steel + Plastic Color: Sliver + White Carbonation Cap Size: 6 x 3.2 cm / 2.4 x 1.26inch (appr.) Liquid Ball Lock Size: 5.5 x 3.6cm / 2.17 x 1.42 inch (appr.) Liquid Ball Lock Under Diameter: 2.9 cm / 1.41 inch (appr.) Liquid Ball Lock Top Diameter: 2.3 cm / 0.91 inch (appr.) Package Included: 1 x Carbonation Cap 1 x Liquid Ball Lock Package List