152mm 6" castor black rubber swivel strong 1320kg capacity, set of 4

Set of 4 - 152mm black elastic rubber castors with top plate.These 4 strong swivel castors has black solid elastic rubber wheels with aluminium centres, ball bearings. Sealed swivel heads with grease nipple. Item dimensions as follows:Wheel diameter: 152mmWheel tread width: 50mmWheel bearing: Ball bearingsTop plate size: 135x110mmMounting hole centres: 105x75-80mmMounting hole size: 11mmOverall height: 211mmLoad capacity: 330kg per castor (1320kg 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.