6001-8-2RS Sealed 1/2"x28x8 Ball Bearing Half inch Bore : 28mm OD Outer Diameter | eBay
Round Plastic End Caps Made in Germany - Etsy
RNT-28 28mm Ring Nut Tool - Ricambi America, Inc.
MAEDLER deep groove ball bearing single row inner diameter 15mm outer diameter 28mm width 7mm shielded on both sides SKU: 61902-ZZ-MAE - Maedler North America