I got these tire inflation air chucks for my VIAIR88p air compressor. Because this compressor has a hose with a fitting that screws into the tire valves, I found it cumbersome to unscrew the hose every time I wanted to inflate the tires. With this air cartridge it is now much easier. The air compressor hose is perfectly connected to the air cartridge without leaking air and fits the tire valve snugly. I am happy with the purchase.