Presto stantest pvt. Ltd. Supplies digital shore a and shore d hardness testers. The digital shore a model of hardness testers, is used to measure the hardness of soft rubber. Again, the shore d model is used to measure the hardness of plastics and solid fibreglass. Characteristics: setting of max and min readings for go/ no-go applications; meets din 53505, astm d 2240, iso 7619, jis k 6253; rs-232 data output for computer compatibility; and over 300 hours continuous use with standard batteries.