Đồng hồ đo độ cứng cao su, nhựa PTC Shore A Scale Pencil Durometer 201A
The durometer's 1/2" diameter base (1.3cm) is the smallest base permitted by ASTM D2240 specifications. This allows it to be used in confined or hard to reach areas other durometers cannot test. ASTM Type A Durometers Test the Hardness of Soft Rubber, Elastomers, Waxes, Printing Rollers, Neoprene, EPDM Rubber, Silicone, and Polyurethane.