This Starrett SRB-3 Rubber Test Block Set is a set of three calibration blocks that are designed to help you achieve accurate hardness readings. This block set is suitable for testing rubber materials, such as gaskets and O-rings. It comes with a Shore A scale range from 27 to 94. The included Shore A hardness scales cover the full range, from 27 to 94. The blocks measure 2 in x 2 in, so they are large enough for your measurements. This Starrett SRB-3 Rubber Test Block Set is a must have for all users who work with rubber materials on a regular basis.
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