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13x20x4 Miniature Sealed Ball Bearings
|13 x 20 x 4 Sealed Ball Bearing|
13 x 20 x 4 Sealed Ball Bearing, One side is Sealed and another side is Shielded, Bearing is made of Chrome Steel, this is a popular size that could be used in many application that uses this size 13mm x 20mm x 4mm.