Size: D30*3mm Grade:N4o Axially magnetized pulling force:13.40lb This is another type of disc magnets a customer used as a small tool holder. We also have magnets of the same dimension with different grades, N38, N38SH, N40, N45 to meet different holding or pulling force requirement. Disc magnets are the most common type in our company. You can be assured about their quality. Never will happen such problems like magnetic field missing, magnetism losing or coating peeling. We have never received such a compliant. If you are looking for this type of magnets, we can offer you 100000 pcs per month. packed in small boxes and then in standard export cartons with magnetism shielding foils