... , grainy, small block, bags, etc. Such as coal, gravel, sand, cement, chemical fertilizer, grain and etc.Belt width (5kinds) :500, ... , established in 2003, with about 9 years' experince in belt conveyors, conveyor idler rollers, conveyor rollers, roller conveyors, idler ... , steel troughing idler rollers, rubber rollers, roller frame, belt conveyor machinery and spare parts, roller support etc design and ...