60PCS quick connect air hose connectors, 5 types of quick connect air hose connector models, ranging from 5/32 ", 1/4", 5/16 ", 3/8", and 1/2 "(every 12), totaling 60 pieces. The air fittings are made of high-quality plastic and are widely used in automation industry, workshop equipment, automotive maintenance, decorative painting, woodworking, dental equipment, etc. Quick connect air duct connectors are easy to install, flexible, space saving, 360 degree free rotation, and the release ring adopts an elliptical design, which is easy to disassemble. There are various types of fittings for 5/32", 1/4 ", 5/16", 3/8 ", and 1/2", respectively, suitable for pipes with outer diameters of 5/32 ", 1/4", 5/16 ", 3/8", and 1/2 ". The simple push in design of the connecting tube does not require additional sealing and can be used safely.