Taiwan standard air valve,precision mold part: 1.Mat: Sus420; Hardness:48 ... factory price Taiwan standard air valve,precision mold part:This type of air poppet valve,high precision,easy install, save space ... the molds; 2.Easy installtion high precision and space saver; 3. Using air valves to control the operation and ... molds design and injection troubles.: Taiwan standard air valve,precision mold part