1. Made of high-quality metal material for maximum durability. 2. Easy to install and use. 3. The CO2 refill adapter is used to fill your SodaStream tank with CO2. 4. The adjustable valve pin ensures compatibility with all variants of cylinder valves. 5. Precision design, corrosion and wear resistance. Specification: Features: Made of high-quality metal material for maximum durability. Easy to install and use. The CO2 refill adapter is used to fill your SodaStream tank with CO2. The adjustable valve pin ensures compatibility with all variants of cylinder valves. Precision design, corrosion and wear resistance. Specification: Condition: 100% brand new Material: Metal Internal thread: TR21-4 External thread: W21.8-14 Color: Black. Silver (optional) Optional type: #1: Black adapter with gauge #2: Black adapter without gauge #3: Silver adapter with gauge #4: Silver adapter without gauge Name: Oxygen flow meter Connection type: 8 mm hose Control valve: With valve Housing material: PMMA Pressure: 0.1 MPa Accuracy: Four grades, 0.5% Temperature: 0–60 ℃ Float material: Agate ball Sealing material: Silicone rubber Height: 65 mm Measuring range: 0.1–1.5 L Package list: 1 * CO2 refill adapter 1 set * wrench seal accessories