10-Pack 5x11mm Bearings 5x11x4mm Ball Bearings PTFE Sealed5x11x4mm Sealed Ball Bearings with PTFE Seals Pack of 10 High Speed & Pre Greased for RC and Hobby Use This 10 pack of 5x11x4mm ball bearings is perfect for RC vehicles, miniature motors, and precision hobby applications. Each bearing is sealed on both sides with PTFE (Polytetrafluoroethylene) seals an advanced material known for its extremely low friction, chemical resistance, and high temperature tolerance. Unlike standard rubber or metal shields,
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