Neodymium Disc magnets

Neodymium disc magnets in all sizes. Laboratories that need to hold a slide on the microscope will go for the smallest magnets. Do you prefer a large pulling power? Magnets that hold? Even though they are small with a diameter of 4 cm and a height of 1 cm, they can easily hold 20 kilograms. Not to be underestimated, those neodymium magnets.