• Our rectangular ferrite magnet, 4 cm (40 mm) long and 2.5 cm (25 mm) wide, offers 1-3 kg of attraction force. Ferrite magnet, also known as oxide (300 oxide) magnets, consists of iron oxide, barium or strontium elements. These ceramic processing magnets, which can withstand high temperatures, can reach temperatures of up to 250°C. • These magnets, which have lower tensile strength than neodymium magnets, are also more economical in price. We have Y35 magnets in shapes such as ring, hole, square, round, as well as rectangular ferrite magnets.