... hardness gauge is an apparatus to measure vulcanized rubber and plastic products.This apparatus has three models of Type A, Type ... of rubber microporous material.Type D: applicable to hard rubber, hard resin, acrylic, glass, cushiony plastic cement, printing plates, fiber, etc. Parameter: Item ... -20~100HD20~90 HDSR 0.1 mmDetailed pictures:Inside packing: Hard Plastic Or Glass Durometer