Features:Easy to use, accurate measurement, easy to carry, sturdy and stable, practical and strong.This rubber hardness tester is a measure of sulfur rubber and plastic products of hardness of the instrument.Made of alloy material,waterproof not rust,fine workmanship,sturdy.The dial scale is clear and the degree is more intuitive and convenient.The connecting device is more convenient to use with the frame.The type O is suitable for the micro-porous materials made of foaming agent in the plastic.Specifications:Type(Optional): A, O, DDial value: 0-100 degreesPressure needle trip: 0-2.5 mmPressure needle end pressure:A/O type: 0.55 N - 8.06 N,D-type: 0-44.5 NAccuracy: 0.1 mmTest force: 0.5 NSize: 78 * 52 * 22 mm/3.07*2.05*0.87inchWeight: 200 gInstructions:The sample on strong plane,take the hardness tester, pressure needle distance sample at least 12 mm edge smooth put pressure on foot pressure in the sample, makes the needle vertical pressure into the sample, until the feet and sample completely contact pressure when within 1 s reading. Measuring at least 6mm apart in different positions of the measurement hardness value 5 times, take the average (micro porous materials are measuring at least 15 mm). In order to stabilize determination conditions, to enhance determination accuracy, hardness tester device should be in the same determination on supporting producer determination.Package Included:1 x Rubber Tire Durometer Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..