This 100mm diameter medium duty swivel castors has a solid black rubber wheel, and the added durability of a zinc plated metal wheel centre. These industrial castors, have a top plate for easy attachment, and can be fixed using our 8mm bolts and nuts. These industrial castors are ideal for a variety of applications, and you can choose from swivel casters, or mix with fixed casters or Braked casters. 100mm Swivel Castors with a black Rubber Wheel with a Metal Centre