BEARING TYPE: Single Row Radial Ball Bearing with deep groove design DIMENSIONS: 20mm bore diameter x 42mm outer diameter x 12mm width PROTECTION: Double rubber seal bearing for enhanced durability CLEARANCE: C3 clearance specification for optimal performance QUANTITY: 4 pieces per package, pre-lubricated and ready to use Model 6004-2RSC3 deep groove ball bearings featuring 100% Chrome Steel construction with double rubber seals on both sides for superior protection. These pre-lubricated bearings offer C3 clearance and support up to 20,000 RPM. Each package contains 4 pieces with dimensions of 20mm bore diameter, 42mm outer diameter, and 12mm width, meeting ABEC 1 specifications for reliable performance in metric measurement applications.