Product Feature: ✔This fitting is made of high quality plastic, with good air tightness, high pressure resistance, firm and reliable, and long service life. ✔Internal card spring design, sealing tight, not easy to unbuckle, special groove design of the sealing ring, to ensure the sealing. ✔Can be applied to the gas pipe range, strong sealing, strong and durable, not easy to deformation burst, the cap can be 360 ° rotation. ✔Easy to connect the air tube, just press easily to pull out the air tube, easy to install, simple and dexterous. ✔Strict production requirements, fine surface treatment, no burr, durable.