1, high silica 2, great hardness 3, economical grinding media for ball mill 4, competitive price 5, professional service 1, Product Name: High Silica Flint Flint Pebble for Grinding industry2, Product Use: Grinding media for ball mill, cement mill, ceramic industry3, Certification: ISO9001:2008 Certificate No.: USA10Q22233ROS4, Chemical Composition: SiO2 5, Technical Data Chemical Data SiO299.31% ...