we are a professional manufacturer of air brake valves, brake chambers, clutch servos, slack adjusters for automobile. max operating pressure:1MPA operating pressure:800KPAoperating temperature range:-40-80port1:M22×1.5 port21,22,23,24:M16×1.5Material :AlSilver: chemical oxidationOriginal No.:934 702 300 0(A) 934 702 320 0(B) sz No.:SZ150301