These durometers comply with ISO, ASTM, DIN and JIS K 6253(new JIS). There are three different type of durometers corresponding to different degrees of hardness.
This is TECLOCK original standard Durometers. The measurement of hardness for difficult materials (thin rubber sheet etc) can be applied easily now and could secure approximated hardness value of Type A by using a indenter height shortened and weaker spring force.
Type A (Shore A), the most common or central durometer,is used to measure medium hardness
Type D (Shore D) durometer is used to measure super hard rubber that has a reading ofmore than 90 points when measuring with a Type A durometer.
Type C for lower hardness is ASKER C. GS-701N(G) is same with ASKER C Durometer and comply with JIS 6050 standard (measurement hardness of eraser).
Type E durometer is used to measure soft rubber that has a reading of less than 20 points when measured with a Type A durometer. ISO7619 refers to the Type E as the Type AO durometer.
Type FO is used for measurement of Sponge and foam materials
Other types of durometer, Please contact us. nanatoolsupply@gmail.com
Instruments - TecLock. 
