Light duty swivel castors, wheel Ø 63 mm, pack of 4, swivel castor, mounting plate. Supplied = pre-assembled, final assembly by customer. Wheel diameter = 63 mm. Structure = swivel castor. Max. load at 4 km/h = 50 kg. Type of mounting = with top plate. Overall height = 89 mm. Swivel castor offset = 30 mm. Screw hole diameter = 6 mm. Fixed castor plate dimensions = 0 mm. Swivel castor plate dimensions = 60x60 mm. Screw hole spacing = 42x42 mm. Housing surface = zinc plated. Max. load 50 kg. Wheel made of high quality plastic, ULTRASOFT running surface for hard/sensitive floor surfaces.