Brackets: Made of high-quality, impact-resistant and reinforced nylon, with encapsulated, double-sealed grooved ball bearing in the swivel head, with zinc-plated, blue-passivated steel top plate fitting (Cr6-free). Modern, shapely design. Wheel: Made of thermoplastic rubber elastomer (TPE), contains traces of oil. Colour: grey. Wheel centre/rim: Made of high-quality, impact-resistant polypropylenee. Chemically bonded. Colour: grey. Chemical characteristics: Chemical resistance to many aggressive substances, except oils. Operating temperature: -25° C to +80° C. At ambient temperatures above +60° C the load capacity is reduced. Maintenance-free under standard conditions. The tread contains traces of oil. On absorbent surfaces this can cause some staining. As an alternative, we recommend the wheels of the VPA, VGA or PATH series.