which means 5 pcs

Exception: if you work with rough surfaces

Gold-plated means that they have a nickel coating first and then a thin layer of gold on top of that as the outer layer

Model: BNT magnets 40mm blue

Power magnet, Skive 6x3 mm. 3M which means 5 pcsNeodymium magnets Permanent magnets Diameter: 0. 6 cm Height: 0. 3 cm Strength: approx. 900 gr. These small, yet extremely strong magnets adhere to all magnetic surfaces, and they hold their own weight by many times. SPECIFICATIONS: Strength: approx. 900 gr. Material: NdFeB Magnetisation: N45 Gauss: 13200 13700 (1. 32 1. 37 T) MGOe: 43 45 Max. temperaturee: 80C Surface: nickel plated (Ni Cu Ni)