Product Name:Quick Connect Air Hose Fittings Kit Material:High Quality Plastic Size:5/32",1/4",5/16", 3/8",1/2" Feature: 1. This fitting is made of high quality plastic, with good air tightness, high pressure resistance, firm and reliable, and long service life. 2. Internal card spring design, sealing tight, not easy to unbuckle, special groove design of the sealing ring, to ensure the sealing. 3.Can be applied to the gas pipe range, strong sealing, strong and durable, not easy to deformation burst, the cap can be 360 ° rotation. 4. Easy to connect the air tube, just press easily to pull out the air tube, easy to install, simple and dexterous. 5. Strict production requirements, fine surface treatment, no burr, durable. Package Included:5/32" 12pcs,1/4" 12pcs,5/16" 12pcs,3/8" 12pcs,1/2" 12pcs.