MVPower 3" Inch Swivel Caster Wheels Rubber Trolley Furniture Plate Castor with Brake, Set of 4 (75mm) Good hard wearing castors suitable for a variety of uses 10cm Gap between floor and plate 2 normal swivel supplied and 2 braked swivel Non-marking rubber 3"(75 MM) casters tyres 21 MM wide, plate 65 MM x 65 MM