MATERIAL: The carbonation is made from Metal material, and it is a highly effective method to add and maintain carbonation in beverages for extended periods of time. SCREW-ON CAP: This carbonation is a screw-on with an integrated lock fitting. DESIGN: It is designed to fit onto most soft drink PET bottles. APPLICATION: With this you can simply fill an old PET bottle with cold liquid of and carbonate by connecting your Liquid lock disconnect. APPLICATION: Making your own soda water, carbonate beer, or even making your own soft drinks. Color: White & Silver Material: Plastic+Metal Package Contents: 1 x stainless steel cover 1 x ball lock dispenser Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.