Product description:
▲Type A Durometer Test Block Kit containing 7 colors,
▲This Type A durometer tests the hardness of hard rubber and plastics.
▲Test block for Type A durometers provides you the ability to develop the proper "feel". while not to be used for calibration purposes, this Test block enables you to perform a quick check for the proper operation of the durometer.
▲To obtain accurate readings using a durometer, one must develop a proper "feel" for the gauge.

▲Type D Durometer Test Block Kit containing 3 colors,
▲This Type D durometer tests the hardness of hard rubber and plastics.
▲Test block for Type D durometers provides you the ability to develop the proper "feel". while not to be used for calibration purposes, this Test block enables you to perform a quick check for the proper operation of the durometer.
▲To obtain accurate readings using a durometer, one must develop a proper "feel" for the gauge.