Features Silicone Rubber Hardness Tester: Type A is suitable for general rubber, synthetic rubber, soft rubber, polyester, leather, wax, etc. Type O is suitable for microporous materials containing blowing agents in plastics. Type D is suitable for general hard rubber, resin, acrylic, glass, thermoplastic rubber, printing plate, fiber, etc. Accurate Measurement: The silicone rubber hardness tester is very convenient to use, and has the characteristics of accurate measurement, easy to carry, sturdy and durable, and strong practicability. Clear Dial Scale: The dial scale of the rubber tire durometer is clear, the degree is more intuitive and convenient, the connecting device and the frame are more convenient to use, and it has a storage box for portable storage. High Stability: This rubber hardness tester is an instrument for measuring the hardness of rubber and plastic products, with high accuracy, high sensitivity and high stability. Fine Workmanship: The hardness tester is made of alloy material, which has the characteristics of waterproof and fine workmanship. It is durable and can meet our needs. Specifications: Type(Optional):  A,  O,  D Dial value: 0-100 degrees Pressure needle trip: 0-2.5 mm Pressure needle end pressure: A/O type: 0.55 N - 8.06 N, D-type: 0-44.5 N Accuracy: 0.1 mm Test force: 0.5 N Size: 78 * 52 * 22 mm/3.07*2.05*0.87inch Weight: 200 g Instructions: 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 6 mm 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. Package List 1 x Rubber Tire Durometer