2PCS 6903 Ceramic Bearing 17x30x7mm 6903-2RS Si3N4 Ceramic Ball Bearing ABEC-5
$21.55
- ✔Type: Hybrid ceramic ball bearing
- ✔ Material: Steel races + Si₃N₄ ceramic balls
- ✔ Precision: ABEC-3 rating (±0.005mm runout)
- ✔ Cage: PA66 polymer (low friction)
- ✔ Lubrication: Premium grease included
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