Kit of 4 heavy duty nylon castors. Wheels without brake Fixing by means of a M8 (8 mm) thread of 15 mm length. Wheel diameter: 50 mm. Total height: 65 mm. Wheel width: 46 mm. Wide application: the plastic casters will not damage the carpet or any floors, easily remain silent to bring your family a quiet and convenient life. So it can be widely used for furniture such as office chairs, tables, suitcases, bookcases, small trolleys, etc.