100 Piece Silver Tone Metal 28mm Outside Diameter Split Key Rings - Walmart.com
6001-8-2RS Sealed 1/2"x28x8 Ball Bearing Half inch Bore : 28mm OD Outer Diameter | eBay
Amazon.com: uxcell Nitrile Rubber O-Rings 28mm OD 23mm ID 2.5mm Width, Metric Sealing Gasket, Pack of 50 : Automotive
Amazon.com: uxcell Nitrile Rubber O-Rings, 34mm OD 28mm ID 3mm Width, Metric Sealing Gasket, Pack of 10 : Industrial & Scientific
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