Description
The SPI Calibration Test Block Kit, Shore D Scale (20 HSD to 90 HSD) is a precision reference kit designed to verify and maintain the accuracy of Shore D durometers used in quality control of harder rubber, rigid plastics, and other firm non-metallic materials. The 3-piece kit spans a hardness range of approximately 20 to 90 HSD, allowing routine check-outs and calibration verification of durometers operating on the Shore D scale.