ECO light duty swivel castors, wheel Ø 50 mm, pack of 4, plastic, swivel castor. Supplied = pre-assembled, final assembly by customer. Wheel diameter = 50 mm. Structure = swivel castor. Wheel material = plastic. Max. load at 4 km/h = 50 kg. Type of mounting = with top plate. Overall height = 72 mm. Swivel castor offset = 25 mm. Screw hole diameter = 6 mm. Swivel castor plate dimensions = 50x50 mm. Screw hole spacing = 35x35 mm. Housing surface = zinc plated. Wheel made of high quality plastic, hard running surface for soft/robust floor surfaces. Max. load 50 kg.