This magnet is a cylinder magnet with oval hole, the hole shaped also called elliptical aperture. The material is sintered ceramic ferrite, the specific size is 9mm in outer diameter, 4.5mm in inner diameter, 10.5mm in thickness. Our magnet can control the tolerance strictly, and the mininum size we can reach 0.4mm. This magnet can work at high temperature and humid environment due to the performance.
The sample display of 9mm cylinder ferrite magnet with hole 9x4.5x10.5mm:
Other size ceramic cylinder magnet with hole: