Rubber seal on both sides:help to save grease and effectively protect grease from Impurities; Smooth rotation with low vibration, durable in use
Low noise,High speed,High temperature resistance,Resistance to high load
Made of high quality chrome steel with double seal, pre-lubricated/greased from the manufacturer, low friction coefficient and stable performance.
Stable Operation:Pre-lubrication, low friction,fast speed and low noise, reduce the pressure on the equipment, good load, providing smooth and efficient movement for a variety of applications-bicycles, motorcycle,Skateboards, Longboards, Inline Skates, Electric Skateboards,toys,mower, roller skates