Solid rubber tyre, non-marking, wheel x width 80 x 25 mm, fixed castor. Supplied = assembled. Wheel diameter = 80 mm. Structure = fixed castor. Wheel material = rubber - solid rubber, non-marking. Material of rim = sheet steel, galvanised. Housing material = steel. Max. load at 4 km/h = 50 kg. Type of mounting = with top plate. Wheel width = 25 mm. Overall height = 100 mm. Wheel bearing = roller bearing. Temperature resistance = -5 C to +60 C. Screw hole diameter = 9 mm. Hub length = 40 mm. Hub bore = 12 mm. Fixed castor plate dimensions = 102x87 mm. Swivel castor plate dimensions = 105x80 mm. Screw hole spacing = 76 - 80x60 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.