Double ball race ways reinforced by wear-resistant tempered steel. The steel bracket has a moderate thickness, relatively bright thanks to the Nickel plating. The caster load capacity is suitable for light and medium industries.

Shiny Nickel coating enhances rust and corrosion resistant. Steel hubs are soldered with the cast-iron core so it is hard for dust, water and silk to intrude the ball bearing and shaft. Thus lessen the needs for maintainance.