The original 50mm Shepherd Ball Metal Castors comes with a top plate fitting and a light brown ball castor covered with a grey polyurethane tyre making it ideal for hard floors. These rubber ball castors are suitable on a range of furniture, beds and sofas, office equipment and small trolleys. The polyurethane tyre added to the Shepherd Castors is kinder to floor surfaces. Easily attached using the square top plate and screws which are also supplied. Kenrick Shepherd Castors with Top Plate Grey and Brown Polyurethane Tyre 50mm