1pcs Neodymium magnet 40x20mm super strong round disc Rare earth powerful Boop Metal Magnet Description: Product Details: Shape: Disc Size:40x20mm Material: NdFeB permanent Magnets Grade:N35 Max Operating Temperature: 80 Celsius degree / 176 Fahrenheit degree Plating: Nickel+Copper+Nickel triple layer plated Package:1pcs 40x20mm magnet Notice: The large neodymium magnets are extremely strong, and must be handled with care to avoid personal injury and damage to the magnets. Fingers and other body parts can get severely pinched between two attracting magnets. It is easy broken,please be careful.Never place neodymium magnets near electronics Neodymium magnets are brittle, and can peel, crack or shatter if allowed to slam together. Neodymium magnets will lose their magnetic properties if heated above 80°C/176°F. Specifications: Brand Name:xhighModel Number:40x20mmWith Holes:NoApplication:Speaker MagnetType:PermanentComposite:Rare Earth MagnetShape:roundCoating:Nickelis_customized:Yestolerance:0-1mmGrade:N35