Blue Rubber Tyre, Black Polypropylene Hub, Zinc Plated, Tente. Non-marking castors with a solid rubber tyre. These castors have a pressed zinc coated steel body that has been passivated for improved corrosion resistance. Tente's polyamide castors are suited to a variety of industrial applications and use universal fittings to aid alteration and assembly. Available in either fixed or rotating, locking or non-locking. Polypropylene wheel centre Roller Bearing Non-marking, solid rubber tread Passivated Zinc coated body offers improved corrosion resistance