... silica 2, great hardness 3, economical grinding media for ball mill 4, competitive price 5, professional service 1, Product Name: High ... Pebble for Grinding industry2, Product Use: Grinding media for ball mill, cement mill, ceramic industry3, Certification: ISO9001:2008 Certificate No.: USA10Q22233ROS4, ... PRODUCT AFTER BURNINGGRAY AND WHITE 7, Product Size: 2-4cm, 4-6cm, 6-8cm, 8-10cm, 10-12cm, 12-15cm8 ...