Libra One New 12" X 2" Trailer Brake Drum Kit 6 on 5.5" B.C. for 5200-6000 Lbs Axle - 22003K One New 12" X 2" Trailer Brake Drum Kit 6 on 5.5" B.C. for 5200-6000 Lbs Axle Bolt pattern: 6 on 5.5" 6 x 1/2"-20 studs installed 2 x bearing races installed Kit also include: 25580 inner cone bearing and 15123 outer cone bearing,Grease seal 2.25" x 3.371", EZ lube grease cap with rubber plug, 6 cone wheel nuts 1/2"x20 thread Fits 12" x 2" electric and hydraulic brakes (not included), Works on Dexter and other brands 5200-6000 lbs axle in the market Ref part #. 008-201, 42656