200mm 8" castor black rubber swivel & fixed strong 1800kg capacity, set of 4

Set of 4 - 200mm black elastic rubber castors with top plate.These 2 swivel & 2 fixed strong castors has black solid elastic rubber wheels with aluminium centres, ball bearings. Swivel castors with sealed swivel head and grease nipple.Item dimensions as follows:Wheel diameter: 200mmWheel tread width: 50mmWheel bearing: Ball bearingsTop plate size swivel castor: 135x110mmTop plate size fixed castor: 135x114mmMounting hole centres: 105x75-80mmMounting hole size: 11mmOverall height: 245mmLoad capacity: 450kg per castor (1800kg per set) Hardness of wheel tread 75° Shore A.Low rolling resistance, low operating noise and very good floor preservation. The high elasticity of the rubber makes the wheel resume to its round shape faster, avoiding flat spots, and therefore gives a lower rolling resistance than for standard grade rubber.Good chemical resistance, except to oils.