Relax nervous or excited horses without the use of drugs or supplements! Magnets are positioned above the axis vertebrae over the pole to calm your horse. Crown piece attaches to halters and bridles with attached elastic loops. Use during trailering, in  the stall or during training sessions. Unipolar Neodymium Magnets have a GAUSS rating of 3,000.  1  3/4" wide x 9  1/2" long