17mm ID x 40mm OD x 12 mm HT or .669" ID x 1.578" OD x .475" High Speed Ball Bearing with METAL SEALS 6203-2RST Y18A2

High Speed Ball Bearing 6203-2RST 17 mm or .669" ID x 40 mm or 1.578" OD x 12 mm or .474" HT with METAL SEALS  6203-2RST  Y18A2

Just like 6203-2RS but with Metal Seals on both sides.