| Material | Ferrite |
| Diameter | 40mm |
| Thickness | 8mm |
| Thread/Hole | M5 |
| Coating | Zn, Ni |
| Force | 9.1kgs |
| Weight | 53g |
It' s the most popular internal threaded ferrite(ceramic) cup magnets,which can be screwed onto any objects with a M4 fitting external threaded pin. The pull force of standard 40x8mm ferrite(ceramic) pot magnets with threaded screw holes is about 9.1kgs, they are delivered with zinc or nickel plating.
