Diameter: 6mm; Round magnets、 suction is strong、 can be used in industrial production、 the gadget adsorption、 etc.、 can also be used for personal creative design. Product Name: NdFeB strong magnet scientific name of the unit、 also known as permanent magnetic energy is currently the strongest. Dimensions: 0.24 in x 0.24 in x 0.39 in (0.6 cm x 0.6 cm x 1.0 cm) Weight: 3.53 oz (100 g)