Master Magnetics, Inc. introduces the new Ferrite (Ceramic) Cow Magnet, patent #7557685, the innovative, low cost protection alternative to the original cast Alnico 5 cow magnet 0.625" diameter, 3" length (15.875mm diameter, 76.20mm length) solid, seamless, smooth, cylinder shape with rounded ends Powerful Ferrite (Ceramic) magnet with proprietary magnetization pattern creates consistent pulling force along length and alignment of tramp iron parallel to magnet Long lasting, 100% retention of powerful magnetism along with healthy composition make it the cost-saving alternative to the age-old Alnico 5 cow magnets Administer with ordinary balling gun. One magnet works for the life of the cow!