10-Pack 5x11mm Bearings 5x11x4mm Ball Bearings PTFE Sealed

5x11x4mm 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, PTFE seals provide smoother rotation while offering excellent protection against dust, dirt, and moisture. These bearings are pre-lubricated with high-quality grease, allowing for quiet, long-lasting performance at speeds up to 55,000 RPM. 🔧 Specifications: ✅ Bearing Size: 5mm (ID) x 11mm (OD) x 4mm (Width) ✅ Type: Deep Groove Ball Bearings ✅ Seal Material: PTFE (Polytetrafluoroethylene) - Low friction, non-reactive, and highly durable ✅ Sealing: Double Sealed for Dust & Contamination Protection ✅ Lubrication: Factor