Libra One New 10" X 2-1/4" Trailer Brake Drum 5 on 4.5" B.C. for 3500 Lbs Axle - 22001 One New 10" x 2-1/4" trailer brake drum 5 on 4.5" bolt circle for Dexter and other brands 3,500 lbs trailer axle Bolt pattern: 5 on 4.5", 2 x bearing races and 5 x 1/2"-20 studs installed Requires L68149 inner cone bearing and L44649 outer cone bearing (not included) Works on 1.718" seals (not included), fits 10"x2-1/4" electric or hydraulic brakes (not included) Ref part #. 008-247-05, 84546