Description: 1 (One) Replacement magnet kit for Dexter & Redline electric brake assembly 12-1/4" x 3-3/8" and 4". The new oval style magnet kit with yellow wire allows you to replace only the worn-out magnet on your Dexter or Redline brakes, rather than having to replace the entire assembly. The oval design increases the efficiency of the magnet while also extending the life of the magnet.