National B-40 Wheel Bearing Designed to meet or exceed OE quality, premium-quality bearings from National® are manufactured to exacting standards to deliver lasting performance and extended bearing life. COMPREHENSIVE COVERAGE -- Industry-leading coverage for domestic and import applications PREMIUM MATERIALS -- Precision manufactured using premium-grade steel for lasting performance and extended bearing life RELIABLE PERFORMANCE -- Element size and quantity are engineered to meet or exceed the load rating of OE bearings BUILT TO LAST -- Advanced heat treatment process for strength RIGOROUS TESTING?--?Comprehensive?testing throughout design and development processes by National engineers for quality you can count on? Package Dimensions: 3.187 x 0.875 x 3.187 inches Package Weight: 0.69 lb Package Quantity: 1 UPC: 724956001750 Bore (Inch): 1.250 IN Bore (mm): 31.760 MM Design: Single Row Angular Contact Inner Race Bore (Inch): 1.250 IN Inner Race Bore (MM): 31.760 MM Inner Race Outside Diameter (Inch): 1.781 IN Inner Race Outside Diameter (MM): 45.237 MM Inner Race Radius (Inch): 0.140 IN Inner Race Radius (MM): 3.556 MM Inner Race Width (Inch): 0.750 IN Inner Race Width (MM): 19.050 MM Outer Race Bore (Inch): 2.110 IN Outer Race Bore (MM): 53.594 MM Outer Race Outside Diameter (Inch): 2.564 IN Outer Race Outside Diameter (MM): 65.126 MM Outer Race Width (Inch): 0.563 IN Outer Race Width (MM): 14.300 MM Outside Diameter (mm): 65.126 MM Series: FWBS Type: E-1 Width (Inch): 0.759 IN Width (mm): 19.279 MM Country of Origin: CN