XRKJKQIDG 4Pcs MR3040H7-2RS Ball Bearing 30x40x7mm Steel Double Sealed MR3040H6-2RS 30x40x6mm Bicycle Bearings for SRAM Dub(MR3040H6-2RS Steel balls)

XRKJKQIDG 4Pcs MR3040H7-2RS Ball Bearing 30x40x7mm Steel Double Sealed MR3040H6-2RS 30x40x6mm Bicycle Bearings for SRAM Dub(MR3040H6-2RS Steel balls)

XRKJKQIDG

bearing Dimensions: 30x40x7mm (inner bore x outer diameter x height). Material: inner and outer rings made of bearing steel GCR15. Ball: G10 grade bearing steel GCR15 steel ball and G5 grade silicon nitride SI3N4 ceramic ball. Grease: Japan imported synergistic KYODO YUSHI grease. Retainer: Nylon PA66+25% GF material.

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