2PCS Full Ceramic Ball Bearing MR63 — 3x6x2.5 MM — ABEC9 precision full ceramic miniature bearings designed for ocean fishing reels and other compact rotary assemblies. Why you need these bearings Smooth, consistent performance: ABEC9 tolerance ensures tight dimensional accuracy for reduced vibration and smoother rotation. Saltwaterready durability: Full ceramic construction resists corrosion and metal fatigue that commonly occur in ocean environments. Longlasting, lowmaintenance operation: Ceramic materials stay stable at speeds and under load, helping reduce wear and the need for frequent replacement. Key features and attributes Model: MR63 (standard miniature bearing designation) Size: 3 x 6 x 2.5 mm (inner diameter x outer diameter x width) Quantity: 2PCS Construction: Full ceramic (nonmetallic rolling elements and race surfaces) Precision rating: ABEC9 (precision tolerance for minimal play and smooth rotation) Primary application: Designed for ocean fishing reels, suitable for other miniature applications that accept MR63 bearings Functionality and performance Low friction rolling reduces drag for faster spool spin and crisper retrieves. precision (ABEC9) minimizes runout and wobble, improving line lay and casting control. Ceramic material maintains dimensional stability at RPMs and under varying temperatures. Compatibility and installation Dropin fit for equipment specifying MR63 (3x6x2.5 mm) bearings. Ideal for use wherever a compact, precision MR63 bearing is required. Suitable for replacement in fishing reel bearing seats or small mechanical housings that accept 3x6x2.5 mm bearings. Typical use cases Ocean fishing reels: worn metal bearings to improve corrosion resistance and reel smoothness in saltwater conditions. speed miniature spindles: Use in small rotating assemblies where precision and low friction are critical. Precision hobby or instrumentation: Ideal for compact devices (gimbals, small motors, micromechanisms) that require MR63 bearings. Notes and practical tips Confirm the bearing seat accepts MR63 (3x6x2.5 mm) before installation. Full ceramic bearings may require compatible lubrication practices depending on the application and housing design. Sold as a set of 2PCS to allow for dualbearing installations or a spare replacement. this precision MR63 full ceramic bearing set for improved corrosion resistance, higher speed capability, and more consistent reel performance in demanding saltwater and miniature applications.