5 in. 660 lbs. Capacity Cast Iron and Polyurethane Double-Bearing Swivel Plate Caster with BrakeRemember when you had the perfect wheels. Add some mobility into your DIY project with some WEN Swivel Casters. Made from durable heat resistant cast iron with non marring polyurethane treads, these reliable wheels measure in at 5 in. Dia with a 2 in. tread width (127 mm x 50 mm). Double 6203 ball bearings reduce friction for smooth rolling. Plate measures in at 4. 5 in. x 3. 9 in. (115 mm x 100 mm) with four 10. 5 mm x 19 mm mounting holes. Mounting