coal mine rubber conveyor belt idler roller 1.material:steel,rubber,plastic,nylon,hdpe 2.used in coal,mine,steel,cement,harbor ... coal mine rubber conveyor belt idler roller Introduction ... Guide,Spiral,Comb and so onMaterialCarbon steel, stainless steel,nylon,plastic,ceramic,hdpe, uhmw-peUsageUsed in coal,mine,steel,cement, ...