Specifications Item Model Number: SW6 Product Dimensions: 146×310 mm / 5.75×12.20 inch Net Weight: 3 kg / 6.61 lbs Materials: Wheel - SBR Rubber; Bracket - Q235B Steel Wheel Outer Diameter: 146 mm / 5.75 inch Maximum Load Capacity: 600 lbs Compatible Door Frame Pipe Outer Diameter: 32-50mm / 1.26-1.97inch Package Content Ring Chain Sliding Door Caster Bracket x 1 M12 Nuts x 2 25 mm Metal Washers x 2 Cotter Pins x 2 V-shaped Bolts x 1