UTOMAG Expert in magnet works on the research and development of magnetic works. Our products are ideal for modeling, crafting, experimenting, and all kinds of accessories. Specification: Size: 5 mm in diameter, 1 mm thick. Shape: disk magnet. Material: nickel coating. Color: silver. Heat resistant up to 80 ℃. The package contains: 100 PCS magnets, 1 package box. With UTOMAG magnets, there are countless ways to rearrange and simplify your life. From crafts, jewelry, office boards, refrigerators, shipping reminders, the possibilities are truly endless. ★ Family and everyday life: refrigerator, spare keys, kitchen, paintings, papers, jewelry, crafts, accessories, and even DIY models. ★ Perfect for office, crafts, science project, school supplies, hobbies, even DIY project. Notes: 1. Due to the strong magnetism of neodymium magnets, they are easy to break if directly collided, therefore, move them parallel to separate and keep distances after separating. 2. Keep it away from children under 5 years old.