Penn Elcom - W0999/B - 100mm / 4" Heavy Duty Braked Swivel Castor. Penn Elcom Sale! from 10217 /per Qty. Add to Cart 100mm / 4" Heavy Duty Braked Swivel Castor.Green Polyurethane/Cast Iron Wheel with Roller Bearings.Grease Nipple for Bearings and Wheel Axle. Part No. W0999/B Material Steel/Cast Iron Style Swivel / Braked Load Capacity 317.5kg Weight 2.8kg Qty available:13 SKU:W0999/B Castors - 100mm