... air valve,precision mold part: 1.Mat: Sus420; Hardness:48 2.Type:8mm,10mm,12mm,16mm,20mm 3.Good factory price Taiwan standard air valve ... ,precision mold part:This type of air poppet valve,high precision,easy install, ... precision and space saver; 3. Using air valves to control the operation and the ... troubles.: Taiwan standard air valve,precision mold part