Specification Magnetization direction: N S pole on both ends of the plane Maximum working temperature: 80'C Other Feature Great for DIY projects such as ammeter、 instrument、 electric motor、 automatic control、 microwave device、 radar and medical equipment Dimensions: 0.59 in x 0.59 in x 0.12 in (1.5 cm x 1.5 cm x 0.3 cm) Weight: 9.77 oz (277 g)