Compare LINCO Polyurethane on Cast Iron Swivel Caster 6" (900 LBS Cap) $37.67 Colson Encore 4 Series Moldon Polyurethane Swivel Finish: Zinc Wheel Diameter: 6 Tread Width: 2 Wheel Type: Moldon Polyurethane Tread Detail: Polyurethane Core Detail: Cast Iron Wheel Color: Red on Silver Bearing Type: Roller Thread Guard: Top Plate... 0 Add to Cart