National A4050 Bearings Manufactured with premium-grade steel, National® taper bearing cones feature crowned raceways and rollers to ensure even load distribution. OE-STYLE DESIGN -- Engineered to meet OE specifications RIGOROUS TESTING?--?Comprehensive?testing throughout design and development processes by National engineers for quality you can count on PREMIUM MATERIALS -- Precision manufactured using premium-grade steel for outstanding durability and performance SMOOTH ROTATION -- Crowned raceways and rollers for even load distribution COMPREHENSIVE COVERAGE -- Industry-leading coverage for domestic and import applications Package Dimensions: 2.062 x 0.875 x 2.062 inches Package Weight: 0.09 lb Package Quantity: 1 UPC: 724956001125 Cone Bore (Inch): 0.5000 IN Cone Bore (MM): 12.7000 MM Cone Length (Inch): 0.4326 IN Cone Length (MM): 10.9880 MM Cone Radius (Inch): 0.0500 IN Cone Radius (MM): 1.2700 MM Country of Origin: US