Bevel type Cow magnet , AlNiCo Cow magnet , AlNiCo cow magnet , stainless steel cow magnet
The size: D16.7x76.2mm,tolerance as per(+/-2%)
[The size: Diameter 0.66''x Thickness 3'' ,tolerance as per(+/-2%)]
[The following is from Wikipedia]
Good feed management is also important; in smaller operations, some farmers pass metal detectors or magnets over the feed.
A cow magnet is a veterinary medical device for the treatment or prevention of hardware disease in cattle. Traditionally, cow magnets were strong Alnico magnets about 1 cm by 8 cm (0.4 by 3.1 inches) in the shape of a smoothed rod.
A rancher or dairy farmer feeds a magnet to each calf at branding time; the magnet settles in the rumen or reticulum and remains there for the life of the animal.
The magnet is administered after fasting the cow for 18–24 hours. This is most effective if done to the entire herd before the age of one.
The cow magnet attracts such objects and prevents them from becoming lodged in the animal's tissue. While the resultant mass of iron remains in the cow's rumen as a pseudobezoar (an intentionally introduced bezoar), it does not cause the severe problems of hardware disease. Cow magnets cannot be passed through a cow's 4th bonivial meta-colon.
Cow magnets are widely available from veterinary, feed supply, and scientific supply sources.