... and plastic products.This apparatus has three models of Type A, Type C and Type D, and each model is subdivided into two types ... T531-99, GB2411-80, hg/t2489-93, JJG304-2003.Attention: Type A: applicable to general rubber, synthetic rubber, vulcanized rubber, ... : applicable to the hardness test of rubber microporous material.Type D: applicable to hard rubber, hard resin, acrylic, glass, cushiony ...