Usage Tips:Features: 1Good sealing performance stable performance no air leakage when connecting can be used for a long time. 2Exquisite workmanship safe and reliable quality stable inflation and long service life. 3Made of brass and aluminum it is durable wear-resistant corrosion-resistant and high-pressure resistant. 4It is connected by female thread G1 / 2 to male thread TR21-4 with simple installation. 5With a special inner hexagonal wrench the installation and disassembly method is simple and practical. Specification: Condition: Brand Item Type: CO2 Cylinder AdapterMaterial: Brass AluminumThread: Female Thread G1/2Male Thread TR 21-4Weight: Approx. 132g / 4.7ozLength: Approx. 4.3cm / 1.7inWrench: Approx. 4.2x1.1cm / 1.7x0.4in Package List: 1 x CO2 Cylinder Adapter1 x Inner Hexagonal Wrench Note: 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.