80mm 3" castor blue rubber swivel & fixed strong 560kg capacity, set of 4

Set of 4 - 80mm blue elastic rubber castors with top plate. These 2 swivel & 2 fixed castors has blue solid elastic rubber wheels with nylon centres, plain bearing. Item dimensions as follows: Wheel diameter: 80mm Wheel tread width: 32mm Wheel bearing: Plain bearing Top plate size swivel castor: 100x80mm Top plate size fixed castor: 100x84mm Mounting hole centres: 80x60mm Mounting hole size: 9mm Overall height: 111mm Load capacity: 140kg per castor (560kg per set) Hardness of wheel tread 70° Shore A. Low rolling resistance, low operating noise and very good floor preservation. Non-marking. 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.