Trailer Hub Kit - 1-3/8" x 1-1/16" Tapered - 5 x 4-1/2" Galvanized. Features:. 1-3/8" x 1-1/16" Tapered. 5 x 4-1/2" Galvanized. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp),LEAD which are known to the State of California to cause cancer, birth defects or other reproductive harm, and CADMIUM which is known to the State of California to cause cancer or other reproductive harm. For more information go to P65Warnings.ca.gov.