... 2-4,4-6,6-8,8-10,10-15cm Natural pebbles for grinding ball in ball mill1.Product:Pebbles/Silica pebbles/Natural ... pebbles2.Size:2-4cm,4-6cm,6-8cm,8-10cm,10-12cm ... ,12-15cm3.Packing:in bulk/ton bags&pallets/ton bags4.Use:grind ceramic material in ball mill5. ... .gtdl.com.cn Natural Pebbles as Grinding Media for Ball mill