Rigid Plate Caster Load Rating 4000 lb. Wheel Dia 8 In. Wheel Width 3 In. Overall Height 10-15/16 In. Wheel Material Polyurethane Inside Bolt Hole Spacing 4 x 5 In. Outside Bolt Hole Spacing 4 x 5 In. Plate Type D Wheel Color Tan Core Material Cast Iron Wheel Bearings Precision Tapered Roller Replacement Wheel Mfr No 200 PTTT Plate Size 5-3/8 x 6-3/4 In. Durometer 95 Shore A Core Color Gray Mounting Bolt Dia 5/8 In. Frame Material Steel Plate Thickness 0.5 In.