Specification Brand : SOUTHWEST WHEEL BulletPoint1 : Pair of TruRyde 10" x 2 1/4" 6-5.5" bolt circle hub and drums with parts BulletPoint2 : Pair of TruRyde 10" x 2 1/4" electric backing plates BulletPoint3 : Works with Al-Ko, Dexter, Lippert,and Quality Trailer Axles. TruRyde parts are manufactured to automotive standard in ISO/TS-16949 registered factory. BulletPoint4 : Comes with Genuine Timken bearing & seals. Lug nuts, grease caps, cotter pins, spindle washers, spindle nuts, and brake mounting washers and nuts are included. BulletPoint5 : Built for 84 spindles with a 4 hole brake flange (inner bearing L68149, outer bearing L44649) BulletPoint6 : QAI Certified & Tested! ExternallyAssignedProductIdentifier1 : 0810067321198 ExternallyAssignedProductIdentifier2 : 810067321198 FitType : TRAILER ItemName : SOUTHWEST WHEEL Pro 3,500 lbs. Trailer Axle Electric Brake Kit 6-5.5" Bolt Circle ItemPackageDimensions_Height : 11 inches ItemPackageDimensions_Length : 35 inches ItemPackageDimensions_Width : 16 inches ItemPackageQuantity : 1 ItemTypeKeyword : trailer-brakes Manufacturer : SOUTHWEST WHEEL PartNumber : BK655ELE-TK ProductDescription : Southwest Wheel Pro 3,500 lbs. Trailer Axle Electric Brake Kit 6-5.5" Bolt Circle. 10" Electric Trailer Brake Kit for utility trailers, travel trailers, horse trailer, motorcycle trailers, and more. Comes with Genuine Timken bearing & seals. Lug nuts, grease caps, cotter pins, spindle washers, spindle nuts, and brake mounting washers and nuts are included. A pair of 10" x 2 1/4" 6-5.5" bolt circle TruRyde hub and drums with parts, and a pair of 10" x 2 1/4" TruRyde electric backing plates. Genuine Timken bearings & seals are included in this kit. Timken parts are stamped & made in the USA. TruRyde parts are manufactured to automotive standard in ISO/TS-16949 registered factory. All studs are 1/2"-20 with yellow finished zinc plating. Hubs are chemically cleaned and painted black in electrostatic booth. Backing plates are CSA compliant. SAE rated friction material. Magnets tested 100% for pull force and conductivity. Will not work on 4,400 lbs. trailer axles, will only work on 3,500 lbs. trailer axles. UnspscCode : 26111500