... 1.Material:steel,rubber,etc 2.Structure:conveyor system 3.Feature:Anti-dust,water proof 4.Colour:red,green,etc Specilized ... , such as Driving pulley, Bend pulley, Pinch Roller, Walled belt, Valves, Tripper, Coal distribution, Protection switch, Through idler, ... Impact idler, Flat carring idler, Belt training idler, Return idler, Return training idler, Flat training ...