Special supply:heat-resistant,explosion-resistant. It caontains: light-duty,middle-sized and heavy-duty. ISO,CE. Carbon steel About us We are ... ).All the products satisfied the standards of the GB,ZB, CE, ISO. Conveyor Idler roller type: Components and belt conveyors spare ... : 1 set at leastDelivery time: Within 30 days, FOB, shippment. explosion-proof belt conveyor machinery for coal mining use