ITEM NAME:12pcs Air Line Hose Compressor Fitting Connector Quick Release Set 1/4 3/8 A3N7 12pcs Air Line Hose Compressor Fitting Connector Quick Release Set 1/4 3/8 A3N7 Perfect start pack of quick release fittings. Compatible with PCL, Vertex, Airflow, Rectus 19 fittings etc... Made of metal for strength and durability. Zinc plated finish for rust and corrosion resistance. Spring loaded quick release couplers for use on the compressor side have a valve built in to shut off the air when changing between tools. 12 Piece Pack Couplers Connectors Coupler Air Compressor Compressor Quick connection fits compressor, air pump, compressed air, pneumatic system Simple to use, just slide back the collar and insert the fitting, then slide the collar fully back to lock in place. Enables tools and airlines to be quickly connected / disconnected. Name: Pneumatic coupling Color: Silver Material: Metal Take the gauge: 1/4 3/8 Quantity: 12pcs Package Contents: 1x 3/8 external thread female connector 1x 1/4 internal thread female connector 1x 1/4 external thread female connector 1x 3/8 internal thread male connection 2x 1/4 internal thread male connection 1x 3/8 external thread male connection 2x 1/4 external thread male connection 1x Rat tail 6MM 1x Rat tail 8MM 1x Rat tail 10MM Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Quantity: 12pcs. Simple to use, just slide back the collar and insert the fitting, then slide the collar fully back to lock in place. Quick connection fits compressor, air pump, compressed air, pneumatic system.