Polyurethane tyre, plate dims. 138 x 110 mm, wheel x width 250 x 50 mm, fixed castor. Supplied = assembled. Wheel diameter = 250 mm. Structure = fixed castor. Wheel material = polyurethane (PU) Material of rim = cast iron. Housing material = steel. Max. load at 4 km/h = 1200 kg. Type of mounting = with top plate. Wheel width = 50 mm. Overall height = 300 mm. Wheel bearing = ball bearing. Temperature resistance = -20 C to +85 C. Screw hole diameter = 10 mm. Hub length = 60 mm. Hub bore = 20 mm. Fixed castor plate dimensions = 138x110 mm. Swivel castor plate dimensions = 138x110 mm. Screw hole spacing = 105x78 - 80 mm. Housing surface = zinc plated. Shore hardness = 92 A. Permanently fixed on precision, machine turned cast rims. Easy rolling, quiet. Hardwearing and cut resistant. Hardness 92 Shore A. Temperature resistant from -20 C to +85 C. Heavy, welded sheet steel housing, zinc plated. Swivel bearing with sealed fork head and combined deep groove ball bearings and tapered roller bear