Controlled heat treating process for lasting performance and extended bearing life Precision manufactured using premium-grade steel for outstanding durability and performance Professional technicians know they can depend on National Industry leading coverage Premium bearing design matches OEM specifications Additional Info: National 5309-KE Ball Bearing NationalR Oil Seals & Bearings offer a full line of premium oil seals and bearings. 1. Package Dimensions: 4.00 x 2.25 x 4.00 inches 2. UPC: 724956158966 3. Bore: 45.000 MM 4. Bore (Inch): 1.772 5. Design: Double Row Angular Contact 6. Inner Race Bore: 45.000 MM 7. Inner Race Bore (Inch): 1.772 8. Inner Race Radius: 1.520 MM 9. Inner Race Radius (Inch): 0.060 10. Inner Race Width (Inch): 1.563 11. Outer Race Outside Diameter: 100.000 MM 12. Outer Race Outside Diameter (Inch): 3.937 13. Outer Race Radius: 1.520 MM 14. Outer Race Radius (Inch): 0.060 15. Outer Race Width (Inch): 1.563 16. Outside Diameter: 100.000 MM 17. Outside Diameter (Inch): 3.937 18. Series: 5300 19. Width (Inch): 1.563 20. Country of Origin: US 21. Remanufactured Part: N