Libra Two 12" Electric Trailer Brake Magnet Replacement Kits - 21025 2 new replacement manget kits for the standard 12"x2" electric brakes works with most 5,200 - 7,000 lbs trailer axles in the market Includes: 2 Magnets with wire, 2 coil springs,2 retainer clips, 6 wire retainer clips