E-Magnets Limpet Pot Magnets provide high performance and a low profile. The pot magnet incorporates a ferrite magnet to give a superior hold on surfaces which are dirty and uneven. Common applications include holding back doors and gates or any other application which needs a solid, positive and reliable magnetic grab. Maximum operating temperature: 180°C.The E-Magnets 896 Limpet Pot Magnet has the following specifications: Diameter: 76mm (3 inch). Height: 12.5mm (1/2inch). Maximum Pull: 33kg (73 lb).