... black colorTesting instrumentsVulcanization tester; Tensile tester; Ozone Aging tester; Rubber durometer; oil resistance tester; Imaging size projector; insulation resistance tester ... AFLAS and more)Hardness: 8 to 95 shore A, tolerance can be ±5 shore A, for some special products, we can ... reach ±3 shore A toleranceColor: for rubber, usually black, for silicone, can ...