Martin Sprocket & Gear Martin C4-RRD-18UPC: 697950847856 | UNSPSC: 24101701 | GTIN:Conveyors & Conveyor Parts > Conveyor Parts > Conveyor RollersMartin Trougher Replacement Roller, 4 in Dia, 21-1/8 in Length, 475 lb, Steel, 04 ga Wall ThicknessSpecs:Wall Thickness: 04 gaLoad Capacity: 475 lbMaterial: SteelDiameter: 4 inLength: 21-1/8 inPackaging:Weight: 20.0 lbCertifications/Standards:CEMA/NIBA Standards