[Type]: MR128-2RS deep groove ball bearings, 8mm inner diameter, 12mm outer diameter, and 3.5mm thickness. [Durable Material]: Made of chrome steel, durability and resistance to deformity under heavy loads. [Double Sealed]: Closed with double shields to protect the bearings from dust or other foreign matter, and has the features of small friction and high speed operation. [Widely Application]: The speed is about 3000 rpm, fit for medium speed toy models, fitness equipment, low-speed motors, sports equipment, etc. [Package]: Includes 10pcs deep groove ball bearings, with pre-lubricating function, easy to maintain. Bearings Type Deep Groove Ball Bearing Model MR128-2RS Material Chrome Steel Bore Diameter 8mm/0.31inch Outside Diameter 12.
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