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 ... . Many world famous ceramic companies have used our products for long time, such as Endeka Cecamic (Johnson Matthey) ...