Bovimax ruminal magnets for cows at risk of "Wire" or "hardware disease".
As you know, metal objects (such as tyre wire) can get in the cows feed, get swallowed and then penetrate the stomach wall. The wire can then introduce infection to the abdomen, liver, and pericardial sack around the heart.
The magnets attract the ferrous metal in the reticulum & rumen and hold it in a sturdy plastic cage. The best magnet available for cattle 350kg and over.