Solid rubber tyre, non-marking, wheel x width 200 x 50 mm, swivel castor. Supplied = assembled. Wheel diameter = 200 mm. Structure = swivel castor. Wheel material = rubber - solid rubber, non-marking. Material of rim = sheet steel, galvanised. Housing material = steel. Max. load at 4 km/h = 205 kg. Type of mounting = with top plate. Wheel width = 50 mm. Overall height = 235 mm. Wheel bearing = roller bearing. Temperature resistance = -5 C to +60 C. Swivel castor offset = 54 mm. Screw hole diameter = 11 mm. Hub length = 60 mm. Hub bore = 20 mm. Fixed castor plate dimensions = 135x114 mm. Swivel castor plate dimensions = 135x110 mm. Screw hole spacing = 105x75 - 80 mm. Housing surface = zinc plated. Shore hardness = 82 A. On sheet steel rim. No annoying black marks on flooring. Very quiet on hard floors. Hardness 82 Shore A. Temperature resistant from -5 C to +60 C. Swivel bearing with sealed double ball race.