The small dial face measures only 1-5/8". Mini-Dial Durometers are compact and easy to carry around the plant or take in the field for on-site testing. The durometer holds maximum reading until reset. Ideal for testing hard-to-reach places or for out-of-sight testing. Scale is divided into 1 point increments from 0 to 100. Measures 1-5/8"W x 5-5/8"H.