Wheel surface hardness is Shore A: 95±2 so the wheel can help reduce noise when operating. Plastic hubs helps reduce dust, water, silk goes into its Single precision bearing. Thus longer caster's lifetime with less maintenance.
Popular M12 threaded stem. Single precise bearing with plastic hubs. Also with the non-marking flat grey PU and dual brake, the caster is suitable for institutions & hospital's furniture, handcart.