Sparex source: https://us.sparex.com/sparex-carbon-steel-ball-bearing-kit-imperial-3-16-to-7-8-10908.html Product: Sparex Carbon Steel Ball Bearing Kit - Imperial ø3/16 To 7/8'' - Sparex S.10908 SKU: S.10908 Listing note: Contains 30 x S.10900 (3/16'')30 x S.10901 (1/4'')30 x S.10902 (5/16'')30 x S.10903 (3/8'')20 x S.10904 (7/16'')20 x S.10905 (1/2'')10 x S.10906 (5/8'')10 x S.10907 (7/8'') Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.