SET OF 30 MAGNETS WITH STRONG GRIP: You will receive 30 self-adhesive magnets that are designed to stick to the self-adhesive back. Please note that the product is very thin and that you do not intentionally bump it against each other. Be careful when trying to separate it. Made of metal and magnets: Strong flat mini magnets are made of metal + magnets with extremely strong pulling or adhesion power. The nickel coating gives the magnets a high gloss, corrosion and oxidation resistance. Strong adhesion: self-adhesive magnetic plates can stably attach metal objects to magnets or attach the magnet itself to magnetic surfaces. Due to the small size of the powerful glass plate magnet, it is more suitable for small and lightweight objects. Dimensions: 18 x 9 x 1 mm. PAIR OF MAGNETS - Simply use a few small, strong neodymium, super strong flat surfaces to securely connect two different objects together and work on both magnetic and non-magnetic surfaces. Widely used: this super strong neodymium magnet can stick notes, photos and more on the fridge or magnetic board. Self-adhesive magnets with hangers can also be used to close plastic and paper bags. Suitable for various DIY projects, science projects, crafts, school supplies, kitchen, office, model building, workshop, assembly, bulletin board and more