Feature: 1. Perfect Fit: The thread of carbonation filling is G1/4, so it can be perfectly adapted to the corresponding bottle, and it works very well. 2. Suitable Type: Our carbonation filler is suitable for PET bottles of drinks and soda, which is very versatile and practical. 3. No Leakage: This carbonation filling is no leakage, easy to install, light weight, and you can carry it with you. 4. Made of ABS Material: This carbonation filling is made of ABS material, food grade, safe and healthy to use. 5. No Damage to Bottles: Our carbonation filling will not cause any damage to your bottles, it is very friendly to bottles. Specification: Item Type: Carbonation Cap Material: ABS Thread Size: G1/4 Weight: Approx. 17g/0.6oz . Package List: 1 x Carbonation Cap