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the NU320EG inner diameter is 100mm
4mm x 9mm x 4mm
✅ Type: Full ceramic miniature bearing
When you need reliable steel balls that roll true and last long
the 6230ZZE outer diameter is 270mm
61904-2RS Bearing Hybrid Ceramic Sealed 20x37x9mm 29424EX the NU320EG inner diameter is61904 2RS Hybrid Ceramic C3 Ball Bearing Chrome Steel and Ceramic Balls 20mm x 37mm x 9mm 61904 2RS Hybrid ceramic chrome steel sealed bearing with ZrO2 Ceramic Balls Electric motor quality, 61904 2RS is commonly used in industrial, commercial, and mechanical systems that uses this size 20mm x 37mm x 9mm, 61904 2RS is closed with 2 Rubber Seals, bearing is double sealed and one seal from each side to protect the bearing from dust or any possible
