Description:Brand new and high quality.Super strong Rare-Earth magnets - once they get stuck with each other， they are hard to break apart.Can also be used to extend protected lithium batteries with recessed contact points.Electrically conductive (making them suitable to extend recessed batteries).Perfect for sticking notes on fridge doors.Great for do-it-yourself projects.Ages:7+ ages， both for kids and adults.Size: 30mm*5mm*3mm.Rating: N35When connecting two magnetic buttons， draw them close to each other slowly and gently. Hard crushing would cause damage and cracks in the magnetic material. Contact us for free if you want to wholesale this， thank you! Included in the Package:> 20 x Blocks Magnets