The carbonation cap is a highly effective method to add and maintain carbonation in beverages for extended periods. The built-in 5/16 inch barb can attach to 5/16 inch ID tubing and a 0.5 micron carbonation stone, allowing the cap to be easily moved from bottle to bottle. Made of stainless steel, it is durable and long-lasting. Compared to traditional bottling, kegging, and home seltzer machines, this cap saves time and money. Simple to use: fill a standard 2L bottle with homebrew or liquid, attach the cap and CO2 system, and shake. Carbonating homemade beverages has never been easier. Use with a standard plastic bottle for an efficient carbonation process. Product Type: Carbonation Equipment Type: Stainless Carbonation Cap Model: Counter Pressure Bottle Filling Cap Condition: Feature: Carbonation cap with ball lock Includes: Ball lock and clamp Usage: Suitable for homebrew soda, beer, juice, water Quality: High Fits: Most soft drink PET bottles Color: Black + Silver Material: Stainless steel + plastic Package Contents: 1 x Carbonation Cap 1 x Ball Lock Distributor Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.