Pack 1 x 7/16"-20, 4 nuts are required to install 1 backplate, 7" or 10". 

Bolt and Nut 3/8" UNC for 12" electric brakes. The required quantity is 10 sets per axle.

Kit includes :  1/2in-20 Pressed wheel stud (5x) 1/2in-20 Cone nut - head 13/16in (5x) 7in x 1-1/4in Drum (1x) 44649 bearing set for 1-1/16" shaft

Kit includes :  Grease cap (1x) 3500lb bearing kit 1/2in-20 Pressed wheel stud (5x) 1/2in-20 Cone nut - head 13/16in (5x) 10in x 2-1/4in Drum (1x)

Set includes :  2-1/4" Grease seal (for 5200 lb) (1x) 2-1/8" Grease seal (for 6000 lb) (1x) Bearing 25580 (1x) Bearing CA15123 (1x) Bearing cup 25520 (1x) Bearing cup CA15245 (1x) Grease cap (1x) 1/2"-20 Pressed wheel stud (6x) 1/2"-20 Cone nut - head 13/16" (6x) ...

Kit includes : 2-1/4in Grease seal (1x) Bearing 25580T (1x) Bearing 14125A (1x) Bearing cup 25520T (1x) Bearing cup 14276 (1x) Ez-Lube Grease cap (1x) 1/2in-20 Pressed wheel stud (8x) 1/2in-20 Cone nut - head 13/16in (8x) Drum (1x)

Dimensions: 2.1" X 3.87" X 6.67" (Shipping) Weight: 0.6 LBS Limited 5 year warranty

Large easy to read dual digital display Protection against short circuit/loss of ground Microprocessor allows control to be mounted upside down and still have a readable display Standard mounting bracket included with optional ball mount available For use on any 12 volt negative ground system Plug & Play feature allows quick and...

For use on 1-4 axle trailers equipped with electric brakes, these complete systems incorporate the highest quiality components in trailer breakaway systems and meet or exceed Department of Transportation (DOT) specifications regarding trailer breakaway and holding requirements.

Dexter 3500lb 10" x 2-1/4" left reverse free trailer brake. Tubing not included.