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uxcell 6002ZZ Ball Bearing 15mm x 32mm x 9mm Double Shielded 6002-2Z 80102 Deep Groove Bearings High Carbon Steel Z1 (Pack of 8): Amazon.com: Industrial & Scientific
Amazon.com: Low Noise 5mm Thickness Double Shielded Ball Bearing, 10Pcs Ball Bearing, for Many Different Projects Small Hobby 6mm Shaft Long Service Life Rod Projects : Industrial & Scientific