Description: 1.CO2 pump (not equipped with gas tank), the customer needs to match it separately (the gas tank model is 16G without screw) U.S. mouth is universal, no conversion is required.Align the air nozzle with the tire nozzle and tighten the air nozzle. 2. Material: aluminum alloy 6063 3. Size: 26*120mm 4. Weight: 56g 5. Gas capacity: 16g 6. Color: Silver 7. Scope of use: bicycle tires, balls, lifebuoys, etc.