100mm x 30mm Industrial Castor Wheels - Dark Grey Synthetic Rubber
4 Inch 100mm x 32mm Heavy Duty Swivel Castor Wheel For Trolley Dolly Caster | eBay
Blue Rubber Castor with Brake 100mm | None Marking Elasticated Rubber Castor | Ross Castors Castors, Trolley Wheels & Castors Online from Ross Handling
100mm x 32mm (4") Castor Wheel with Black Plastic Hub, Grey Rubber Tyre - Sport Chair Castors, Sport Chair Castors from Mobility Pitstop