A real bargain for you: This one is strong and sturdy. Manganese raceway and Dust proof ring are not something you'll see everyday. This one will last very long at minimum maintenance effort. The wheel is soft and protected by 2 covers.
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.