Advantage: The life time: more than 30000 hours Samples for testing are available. The more relaxed payment terms Detailed conveyor steel drum feature: 1.Steel pulley's size depends on the detailed belt width, the structure can be according to our design or the customers' requirements, which are used in the steel industry, harbor, coal industry, power industry, cement industry, etc 2.Tube: q235 3.Shaft: 45# steel 5.Bearing: single & double row deep groove ball bearing 2rz&2z with c3 clearance. 6.Seals: grease retaining inner seal with multi-stage labyrinth and retention cap with outboard rubbing flinger seal. 7. Lubrication: grease is lithium soap type grease with rust inhibitors. 8. Welding: mixed gas shielded arc welding end 9. Painting: ordinary painting, hot galvanized painting, electric static spraying painting, baked painting Besides we can manufacture the rollers and idlers according to the buyers' requirements. Wooden box