| Available Scales: A, B, CF, D, DO, M, O, OO, OOO, OOO-S, RR. The Precision Durometer features a full-sized dial face for readability to within 1/2 point. It offers the maximum accuracy available in a dial model gauge at a minimum cost. Type M Durometers require test stand 1086866 per ASTM D2240. What is included: Durometer, instruction manual, NIST Certificate, carrying case Technical Spec: | Measuring Range | 0 - 100 units | | Accuracy* | ±1 durometer unit (A,B,C,D,E,O,DO) ±2 durometer units (OO,OOO) ±4 durometer units (M) | | Dimensions | 2.25" x 6.125"H | | Weight | 6 oz. | | * Note | per ASTM D 2240-05, Sect 9.3: It is accepted that durometer readings below 20 or above 90 are not considered reliable. It is suggested that readings in these ranges be omitted. | Selection Guide: For more technical info, click here. |