... Rigidity HRA 87 min, 9 (Mohs) Slenderness ratio 8.0Mpa.m1/2 wearing value international standard Specifications(Diameter mm) 0.6-0 ... -1.0,1.0-1.2,1.2-1.4,1.4-1.7, 1.5-2.0,2.0-2.5,3,4,5 ... customizedCharacteristic 1. Good round sphere, smooth surface, pearl-like sheen. 2. Good tenacity, impact-endurable, no break under high speed impact ...