Non-Standard 3/4" Bore Bearing 0.75" ID 3/4" x 47mm x 14mmNon Standard Ball Bearing it has a 3 4" inch imperial standard Bore Metric 47mm OD and 14mm Width 3 4" Inch x 47mm x 14mm Sealed Ball Bearings, bearing has rubber Seals to protect the bearing from dust or any possible contamination, these bearings are lubricated with grease, single row, radial, deep groove ball bearings, the chrome steel balls are separated by a steel cage, dimensions are 3 4" Inch ID x 47mm OD x 14mm wide, here is the 6204 2RS