1.Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry, harbor, coal industry, power industry, cement industry, etc 2.Tube: Customize Welded Steel Tube 3.Shaft: Bright Drawn Steel to required bearing tolerance 4.Shaft End: Both ends of Tube are simultaneously machined and chamfered. 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. Our roller saves on repair and maintenance costs of the conveyer belt due to the concentric design which decreases vibration.