... with about 10 years' experince in belt conveyors, conveyor idler rollers, conveyor rollers, roller frame design and production. All of ... .Absolutly rust-resistant.Mterials: Carbon steel, Q235. Rubber belt. Belt materials(4 kinds): Canvus(56N/mm.layer), nylon(100 ... cleaning device in the middle.)8. Brake device (Roller stopping device, Belt stopping device)9. Accessories (covering, inverted trough, ...