The Checkline AD-100-B Type B Shore Durometer for Harder Elastomers and Plastics. Use Above 93 A scale. is the genesis of years of experience offering high quality Durometers to discriminating users. Featuring an 18mm footer that offers high stability and conforms to all international standards, the AD-100 is the ideal durometer for a wide range of shore hardness measuring applications. The AD-100 displays hardness readings on an easy-to-read analog scale calibrated in 0 to 100 Shore units. An optional MEMORY POINTER holds reading until manually reset, allowing operator to concentrate on measurement task. Also valuable if used in a position where dial is obstructed.