“Replacement magnet fits 10″” trailer brake assemblies designed for 3,500-lb axles
Dimensions: 2″” long x 3-1/8″” wide x 1″” tall
Magnet, retaining clip, and spring included”
“2 new replacement magnet kits for the standard 10” electric brakes, used for most brand 3500# axles in the market.
The listing has 2 kits, which are replacements for one axle”