Shore A Digital hardness testers are used to measure the hardness of rubber and plastics. Type A durometer is applicable to test the penetration medium hardness of rubber, plastic, leather, multi-grease, wax, etc. NOTE: A minimum thickness of 6mm as sample test probes is recommended for measurement's optimal results (if it's less you may add more layers but should be not more than 3 layers) and measuring point of at least 18mm distance from the outside edges. It is recommended that measurements be made with the type D durometer when the value is above 90 HA Features: Wide measuring range Hold Function With Zero setting Clear test value Small, lightweight and can easily be transported Delivers ultra accurate reading with no guessing error Easy to read large LCD display Battery operated Passed and conforms with ISO 868-1986 & ISO 7619 international standards Comply with GB/T 531.1-2008 standard Maintenance-free digital display CE Marking Specifications: Dial Scale: 0~100HA Resolution: 0.5HA Total measure force: 8.1N Outside pressure: 1kg Pressure needle top cone angle of 35° Needle length: 2.5mm Flat cone point: φ0.79mm diameter On/Off Switch Set Includes: 1 x Shore A Durometer 1 x English Instruction Manual