Amazon.com: Ball Bearings - 0.25 inches Ball
[8-Pack] R4A-ZZ - Miniature Deep Groove Radial Ball Bearing 0.25 in x 0.75 in x 0.2812 in (ID x OD x Width) | 6.35 mm x 19.050 mm x 7.142 mm (ID x OD x Width) with Double Metal Shield 19.99 19 . 99
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