"This heavy-duty Ultra-Tow trailer axle is made from premium high tensile strength steel. Spindle is machined to extremely close tolerances on world-class machining equipment. Each spindle is fully inspected. Sold individually. Spindle Diameter in. 1 3/4, Inner Bearing Size in. 1 3/8, Rated Load lbs. 1,750, Outer Bearing Size in. 1 1/16, Stub Axle Type Tapered, Seal Size in. 1.72, Overall Length in. 8, Stub Axle Diameter in. 1 3/4 round. High tensile strength steel axle Spindle is precisely machined Spindle must be properly welded to axle tube Includes castle nut, cotter pin and washer"