6304-2RS 6304-ZZ Radial Ball Bearing 20X52X15TBBS only sells the highest quality radial ball bearings produced by high standard factories.  The 6304-2RS and 6304-ZZ is a 20mm ball bearing that is found in many applications. The 6304-2RS ball bearing has two contact rubber seals one on each side of the ball bearing6304-2RS Bearing 20x52x15 Sealed Ball Bearings: DeepTwo (2) 6203-2RS Sealed Bearings 17x40x12 Ball Bearing / Pre-Lubricated $6.25($3.13 / Bearing)  This 6304-2RS 20x52x15-millimeter sealed ball bearing has deep groove geometry for high speeds and supporting both radial and axial loads.  This deep-groove sealed ball bearing is for use 
6304 2RS 20mm Bore x 52mm OD x 15mm W Single RowBore Size, 20mm. Dynamic Load Bearing, 3580 lb. Enclosure Type, Double Rubber Sealed. Finish, Chrome. Material, Steel. Material Grade, 52100 Through 6304-2RS - AST Bearings6304-2RS single row deep groove ball bearing drawings. ABEC Grades 1, 3, 5, 7, and 9 are available. Two rubber seals = (2RS), also available with a single 6304-2RS Medium Ball Bearings - NPBNPB 6304-2RS Medium Ball Bearings - Replacement for SKF 63042RS, Koyo 63042RS, Nachi 63042NSL, Timken 304PP, Federal 1304RR, Hoover 99304,