100mm 4" castor rubber tyre, swivel with brake, strong 180kg capacity, set of 2

Set of 2 - 100mm black rubber castors with single bolt hole fitting. These 2 swivel with brake castors has black solid rubber wheels with pressed steel centres. The brake locks both swivel and wheel at the same time. Item dimensions as follows: Wheel diameter: 100mm Wheel tread width: 30mm Wheel bearing: Roller bearing Bolt hole size: 10.5mm Overall height: 127mm Load capacity: 90kg per castor (180kg per set) Hardness of wheel tread 85? Shore A. Reasonable rolling resistance, low operating noise and very good floor preservation. Good chemical resistance, except to oils.