This pack is sold as five (5) pairs

The rubber shell ensures that the magnets for the running number do not slide around on the clothes and the bib during the run

Model: Blue Chalk Marker Medium Line

And the AlNiCo products are made specifically for experiments and teaching

The strength of 8 kg

Power magnet, Skive 20x3 mm. knivskinne This pack is sold asNeodymium magnets Permanent magnets Diameter: 2 cm Height: 0. 3 cm Strength: approx. 3. 9 kg. These small, yet extremely strong magnets adhere to all magnetic surfaces, and they hold their own weight by many times. Suitable for magnetic glass boards. SPECIFICATIONS: Strength: approx. 3. 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)