Blue Elastic Rubber, Zinc Plated Steel, Tente Non-marking castors with a elastic, vulcanised tyre. These castors have a zinc plated steel body passivated for greater corrosion resistance and precision ball bearings. Tente's castors are suited to a variety of industrial applications and use universal fittings to aid alteration and assembly. Available in a variety of sizes in locking and non-locking types, fixed and swivel.