Made of plastic material for good sealing performance, rust protection, durability, anti-static, strength and durability. Quick connectors for use on the compressor side have a built-in to shut off the air when you tools. Easy to use, just slide the collar back and insert the fitting, then push the collar back completely to lock it in place. Quick release couplers for use on the compressor side have a built in to prevent air escaping while changing between tools. Features - Color: Blue and black. - Material: Plastic. - Size: 4.00X1.20X0.80cm/1.57X0.47X0.31inch. - Good sealing performance, rust resistant, durable, sturdy, strength and durability. - Used for air tools, air compressor, air nailer, air blow, pressure washer, air hose, etc. - The air connector can well reduce accidental disconnection. - Made of premium plastic material. durable and for corrosion protection. - These connectors and fittings enable tools and airlines to be quickly connected and disconnected. Package list: 10 connectors