Sharpmag Ringed Rumen Magnet - 3 Pk by Sharpmag at Fleet Farm
Cow Magnet ~ Heavy Duty
BOVIMINI ruminal magnet, 10/pk
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
Silver Bullet Cattle Magnet 383690 | Heritage Animal Health
BOVIVET ruminal magnet, 10/pk
FerriMax PlastiCAP Magnet (12 Count)
Cow Magnets - MMPA
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