Features: 1. Multi function: can use for DIY items, can use as Refrigerator Magnets, Science Project Magnets, can use for Office, for Scientific Purposes, for Arts and Crafts or in the Classroom at School, can also use in life to make collar tidy.2. with corrosion Resistant and Non-Scratching Surface, all small magnets are smooth and shinny.3. can use for long time. all magnets are plated with nickel alloy for maximum durability and protection against corrosion. Specifications: Size：5x1mmColor: SilverMaterial: Neodymium magnet Package including: 100pcs Material Features: Magnets are made of a brittle material. These magnets are not as strong as steel. They are more like a brittle ceramic. If you let two magnets slam together, they can crack and break. This is true for magnets large and small. WARNING!!!Strong magnets should Keep away from Ironware and some easily magnetized iron products, such as Electronics, Phones, monitors, bank cards, computers, televisions, mobile phones and other. These magnets are very powerful which should be handled with great care. Without parents supervised do not allow children to playing magnets as they could get injured. Especially pay attention to the small magnets , please place in somewhere children can’t reach place.