If you are working with metric measurements, BuyMagnets.com offers alnico pot magnets designed with metric dimensions for a perfect fit. Alnico magnets can tolerate temperatures of up to 1000°F—or 537°C—but they will perform best at temperatures below 800°F, or 426°C. To avoid performance drops, we suggest mounting these magnets with nonferrous fasteners and insulating them when they are being installed in ferrous materials.