Dual Wheel Kingpinless Caster Load Rating 6725 lb. Wheel Width 3 In. Wheel Dia 8 In. Mounting Type Plate Inside Bolt Hole Spacing 4 x 7-3/4 In. Outside Bolt Hole Spacing 4 x 7-3/4 In. Durometer 95 Shore A Overall Height 10-1/2 In. Plate Size 7-3/4 x 9-3/8 In. Mounting Bolt Dia 5/8 In. Frame Material Steel Wheel Color Tan Wheel Material Polyurethane Caster Type Swivel Core Color Gray Core Material Cast Iron Raceway Single Ball Hardened Precision Tapered Roller Wheel Bearings