"This heavy-duty Ultra-Tow hub is preassembled, prelubed with premium grease and ready for easy assembly on your trailer axle. Use the Ultra-Tow Easy ID to easily identify the components you need. Constructed with ductile cast iron for higher tensile strength, less deflection and excellent corrosion resistance. Electroplated to resist rust and corrosion. Inner Bearing Size in. 1 1/16, Seal Size in. 1 1/4 & 1 1/2, Spindle Size Dia. x L in. 1 1/16 x 4, Bolt Circle Pattern in. 4, Studs qty. 4, Weight Capacity Each lbs. 1,350, Outer Bearing Size in. 1 1/16. Includes hub with bearing cup, studs, bearings and seal installed, with the dust cap, dust cap installation tool, cotter pin and lug nuts Two of the most commonly used seals 1 1/4in. and 1 1/2in. are included to suit most applications Electroplated to resist rust and corrosion Sold individually"