UFP trailer idler hub with a 5 lug on 4.5" bolt pattern hub (bearings, seal, lug nuts, cotter pin and stainless steel trailer buddy sold separately). Plated for excellent corrosion resistance. Fits standard 1 3/4" x 1 3/4" straight 4200 lb axle spindles with L68149 inner and L68149 outer bearings (not included). Specifications: Spindle Size: 1 3/4 in x 1 3/4 in tapered Bearing and Seal Information: UFP HUB #41174 Inner Bearing #L68149 (sold separately) Outer Bearing #L68149 (sold separately) Double Lip Grease Seal 168255 (sold separately) Races (included) Lug Pattern: 5 on 4.5 in with 1/2 in wheel studs. To determine your trailer wheel lug/bolt pattern click here Hub Capacity: 4200 lb Dust cap outside diameter: 2.328 in Zinc plated finish for corrosion resistance This wheel hub is very common and can be used as a direct replacement for any trailer wheel idler hub requiring these specifications.