Trailer Brake Assembly 12" x 2" Left & Right 5200lb 6000lb 7000lb Axles 4 Electric Trailer Brake Assemblies 12" x 2 1/4" Bolt Circle diameter: 4" | Center Hole diameter: 3" Rated up to 3,500 lbs to 4,000 lbs **Will Replace most Dexter & Lippert Brake Assemblies**