One Dozen of West Coast Telemetry  Tracking collar Magnets.  Will work on most tracking collars,   They are a strong magnet 1" x 1/4 " in diameter this is for a lot of 12 magnets one Dozen for $18.00.  We are a full service Hound Supply & Telemetry company.  We build and repair tracking collars, our #1 seller is the Tag-A-Long, it slips on your Garmin T-5, TT-15, TT10 or DC40/50 West Coast Telemetry Hound Supply