100mm Fixed Castor (REVVO Brand) with a White Nylon Wheel. The top plate measures 145mm x 110mm and the Fixing Bolt Hole Centres are 105x80mm.
The castor wheel has a 35mm Tread Width with a Needle Roller Bearing and the Load Capacity is 225kg using manual propulsion at 4km/h (walking speed).
The white nylon wheel is a hard tread which provides the lowest rolling resistance and maximum mobility. Being nylon the wheel is non-marking and will not damage concrete floors.