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Standard use for Type A rubber hardness tester (GS,GSD-719J Series) such as:
GS-719N, GS-719G, GS-719P, GSD-719K, GSD-719K-R, GS-719H. GS-719L, GSD-719K-H, GSD-719K-L, GS-719P, GS-709P, GS-779G. GS-709N, GS-709G, GS-709P, GSD-719K. GS-706N, GS-706G, GSD-706K
Hardness: 50
Dimensions (mm): standard model 40×80×12
