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Amazon.com: Master Magnetics COW-RUM5CX12 Cow Magnet, Ultimate Heavy Duty Ru-Master 5, Steel Ring and Ferrite, 0.75" Diameter, 3.375" Length, Black and Silver (Pack of 12) : Industrial & Scientific
Amazon.com: Master Magnetics COW-RUM5CX3BX Cow Magnet, Ultimate Heavy Duty Ru-Master 5, Steel Ring and Ferrite, 0.75" Diameter, 3.375" Length, Black and Silver (Pack of 3) : Industrial & Scientific
Quick Draw, 4 Ring Magnet, Heavy Duty - Augusta Cooperative Farm Bureau, Inc.
AlNiCo Cow Rumen Magnet, Standard Cast AlNiCo 5 Cow Magnets, Alnico 5 Cow Pill, Cow Alnico Magnet, Bar Cow Magnet, Alnico Steel Magnet, Alnico V Bullet Magnet- Buy Product on Hang Zhou