Feature: 1. Good magnetic effect and it effectively traps the iron in the cow's stomach 2. It is harmless to cattle and can be removed by means after a period of time. 3. Plastic design, not rust and corrode in the cow's stomach. 4. Strong magnetic cage can absorb nails, wire and the like metal garbage, to protect the cattle stomach. 5. A good treatment for preventing hardware disease of cows. Specification: Condition: 100% Brand New Item Type: Cow Magnets Material: Magnet + Plastic Color: As Pictures Shown Product Size(single): Length: Approx. 10 cm/3.9 inDiameter: Approx. 3.5 cm/1.3 in Weight: Approx. 235.0g Suitable for pet type: Cattle Product Function: It was placed in the stomach of the cows and sucked the iron substance out of the stomach . Package List: 2 x Cow Magnets Note: 1. Please allow 13cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.