Check the listing for details. (10) 6004-2RS Premium Rubber Seal Ball Bearing C3 EMQ, 20x42x12, 6004 2RS 6004rs. Width: 12 mm, Condition: New. Listed at 16.45 USD. Dimensions: 20x42x12 mm ISO 9001:2008 CERTIFICATE Rubber seal on both sides Chrome Steel (AISI 52100) for higher resistance and durability Supports 21,000 rpm Our high-quality bearing is made to reduce your replacement frequency and maintenance cost Model: 6004 2RS Quantity per Package: 10 Pc Material: Chrome Steel (AISI 52100) Protection: Rubber Seal on both sides Greased / Lubricated: Yes Bore (Inner) Diameter: 20 mm Outer Diameter: 42 mm Width (Thickness): 12 mm Supported Revolutions per Minute (RPM): 21,000 PGN's 6004RS (20x42x12) is a single-row bearing that supports radial loads, made with Chromium Steel providing superior quality and durability. It comes pre-lubricated and shielded to keep the lubricant in and contaminants, dirt and debris out.