The caster is designed based on America's style so at first glance it's not so bad. But if you look closer, the Zinc coating is just so so, bracket steel & PVC wheel is not good and sharp. However, price is great for a ball bearing caster.
The N Series is much like a New Series of design and quality. The N Series has Japanese dual brake style. Along with JP dual brake is a very cushion rubber: soft, wear & tear resistant.