Universal Heavy Duty Twin Wheel Swivel Castor Wheels with Brake and Square Plate (50mm, Pack of 4) by DELIAWINTERFEL Package Contents:4 pcs Caster with BrakeFeatures:* Rim and Galvanized-chromated steel sheet housing* Semi elastic solid rubber caster* Roller bearings and stored* Swivel bearing with dual Ball Wreath* Wheel Diameter: 50 mm* Wheel Width: 17 + 7 mm* Total Height: 71 mm* 60 x 60 mm Screw Mounting Plate* Screw Hole Spacing: 46 x 46 mm* Loading capacity per double roll: 100 kg* Colour: Grey Universal Heavy Duty Twin Wheel Swivel Castor Wheels with Brake , Square Plate (50mm, Pack of 4)