623-MF Micro Casting Bearing 3 * 10 * 4 mm (1 PC) ABEC-7 for Spinning Reel Water Wheel Bearings 623 Drum Bearing

["High Speed Bearings for Fishing Reels & Micro Motors","High-RPM Precision Micro Bearings","This self-lubricating bearings are oil-free, SIC ball in rotation will produce self lubricating, after cleaning and maintenance do not use bearing maintenance oil.","SPECIAL NOTE: ceramic ball bearing rotation sound larger than traditional bearings, Sound like Sha~ ShaSha~","Micro Casting Bearing very small, please confirm the size before you buy."]