After building the frame of your modular cart, it is time to choose the type of castors you want to equip it with. The Admiral castors are perfect for this job as they don't leave any marks on soft surfaces such as ballet floors. Castorset WACS125B: · includes 2x swivel castors with brake and 2x swivel castors with no brake · these castors have a diameter of 125 mm and a load capacity of 220 kg. SPECIFICATIONS Colour blue Castor size 125 mm