Naiwo quick coupling factory is located in hebei province, China.It has more than 20 years of experience in production of quick coupling with stainless steel, carbon steel and brass material.Our main standard items including ISO16028 Flat face coupling,ISO-A & ISO-B poppet valve coupling,valveless coupling,threaded locking coupling.We also provide customized services based on your samples or drawings.We have Skilled workers with advanced equipment mechanical arm & CNC machining center to make the couplings with Exquisite workmanship and good function. Welcome to contact us for an inquiry.