Part may or may not include box.
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eBay
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Model: 693ZZ L-830ZZ. Size: 3mm 8mm 4mm.
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Gear Belt Bearings Couplings Chain Belt Pulley Nut Motor Bracket Other. SUJ2 high carbon chromium bearing steel: The bearing body is made of SUJ2 high carbon chromium bearing steel, which has good comprehensive performance, high hardness, good wear resistance, and high fatigue strength.
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eBay
Bearing has discoloration from protective grease used during storage. Bearing may be lightly coated with grease for protection during storage.
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