Caster Mounting Type Plate Load Rating Range 300 to 999 lb Load Rating 550 lb Wheel Dia 2 1/2 in Wheel Width 1 1/4 in Inside Bolt Hole Spacing 2-3/4 in x 2-3/4 in Wheel/Tread Material Nylon Caster Brake Type Leveling Pad Core Color Black Wheel Core Material Nylon Frame Finish Powder Coated Includes Mounting Hardware General Purpose Leveling Plate Caster Mounting Bolt Dia 3/8 in Outside Bolt Hole Spacing 2-3/4 in x 2-3/4 in Swivel Raceway Type Double Ball