Super Strong Round Disc Magnets Rare-Earth Magnet Dia 16-20mm Thickness 1-30mm
20 10mm 20 15mm 20 20mm 20 30mm. Only suitable for people aged 14 and above. Magnet have strong magnetic properties. Do not swallow them. 16 5mm 16 6mm 16 8mm 16 10mm 16 12mm 16 20mm 16 24mm. Do not directly smash, keep a certain distance after separation.