Bearing has discoloration from protective grease used during storage. Bearing may be coated with grease for protection during storage.
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20 x MR104ZZ Bearings. It has simple structure, high rotation speed, small friction coefficient, low vibration and noise. Material: Made of bearing steel, it is not easy to wear and is an excellent substitute.
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You should receive the item within 2-4 weeks. Therefore, make sure you need it before buying the product.
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eBay
624ZZ 4x13x5mm. Item: 623ZZ Ball Bearings. 623ZZ 3x10x4mm. Type: Deep groove ball bearings. Deep groove ball bearings. Ball in the cage loop to run a smooth ball guide surface to ensure even if high-speed operation, low noise.
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304 stainless steel ball is the most widely used steel ball on the market. Material: 304 Stainless Steel. -Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.
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eBay
eBay