The air compressor check valves is convenient and practical, with excellent texture, and without being easily damaged. The craftsmanship can serve you well without breaking easily. This is a very practical air compressor check valves.Features-Color:Golden-Material:Brass-Size:4.00X3.80X3.50cm/1.57X1.49X1.38inConnector: 14mm, 16mm- Allowing residue gas from air compressor to get to air tank while gas from air tank cannot go to air compressor.- When check valves malfunction, gas from air tank will let out through decompression valves, then air compressor will restart repeatedly.- Practical and durable air compressor pressure check valves, easy to install or disassemble, time-saving and effortless.- Threaded design, can be installed and fixed more firmly, you can use rest assured.- It is manufactured with professional technology to ensure the product can work for a long time.Package list: 1 Compressor Check Valves