1. Name: brass safety valve for auto 2. Thread: 1/4",3/8",1/2" 3. Working ... devices are CNC machining centers, homemade digital control lathe,air test device, special painting line, ect. Nameoperating tempretureoperating pressure(Mpa)connection ... sizeMaterialbrass auto safety valvet<200C0.1-1.51/4", 3/8"brass ...