1、G5/8 Thread: This quick fill adapter has standard G5/8 thread, which has strong adaptability and good compatibility. With fine workmanship, this refill adapter has no leakage during inflation. 2、Multiple Usages: This adapter can serve as an inflation connector, connecting an air pump to inflate gas tank, or as a large to small adapter to transport gas from large tank to small tank. 3、Applicable Range: This tank refill adapter has a rated working pressure of up to 4500psi (30MPA), suitable for high pressure air (HPA) or CO2 tanks, with a wide range of applications. 4、Aluminum Alloy: This quick fill adapter is made of excellent aluminum alloy, with anodized black unit, erosion resistance, oxidation resistance, and suitable for various environments. 5、Including Parts: This kit includes a air tank adapter hose, 2 O rings, and 2 washers, which is convenient to connect and use, greatly improving air inflation and gas transfer efficiency.