Specifications: Inner diameter 5mm, outer 11mm, thickness 4mm. Model MR115‑2RS. Weight 16g for all 10 pieces. Deep groove design handles radial and light axial loads. Miniature Ball Bearings 5x11x4mm: MR115‑2RS deep groove bearings fit small‑diameter shafts. 10‑piece set provides spares for 3D printers, drones, RC models, and other tight‑space applications. Double Shielded Rubber Seals: Non‑contact dual rubber seals block dust and debris while maintaining friction‑free performance. Keeps lubricant in, contaminants out for longer bearing life. Bearing Steel Construction: Made from high‑carbon chrome steel with precision ground raceways. Delivers low vibration, high rotational speed, and consistent operation under moderate loads. Easy Installation & Replacement: Standard dimensions fit many small mechanisms. Use for 3D printer filament guides, quadcopter motor shafts, skateboard wheels, or fidget spinners. Reliable upgrade for worn parts., Manufacturer: Hilitand