Industal 4PC 4"(2F2S)Heavy Duty Polyurethane Cast Iron Castor Wheels (Set of 4) *heavy duty, impact-resistant polyurethane castor with cast iron core, roller bearing, precision ball bearing swivel with grease point, works on rough, chip littered floors, oil and grease, great for warehouses, industrial work, factories and automotive shops etc *includes: 2 fixed rigid castors and 2 swivel castors *wheel size: 4"x2" (100x50mm) *load capacity: 270kg/each castor wheel *top plate dimension:114x100mm (5mm thickness) *castor height: 143mm