Phono cartridge with spherical diamond. The housings of the OM cartridges have been designed for easy mounting and alignment on both top-mount and bottom-mount headshells. The OM 5 series offers excellent compatibility for use in a range of playback systems and with a variety of phono preamps. The OM Super cartridge models feature split pole pins that reduce magnetic losses in the high-frequency range, extend the frequency range, and improve phase linearity. Compatible and interchangeable with the following stylus inserts: 3E, 5E, 10, 20, 30, 40 & 78 and D 25 M. Made from a Noryl blend that ensures high rigidity and resonance-free performance. Featherlight, weighing only 5 grams. If your tonearm has a standard headshell or cartridge mount, you can achieve optimal sound reproduction with the OMs. A look at one of these cartridge systems reveals Ortofon's answer to perfect adaptation to the tonearm. At the top of the mount, there is a tiny, removable weight plate hidden away. Stylus types and interchangeability. By using a wide range of replacement styli, the OM 5 series can provide an optimal fit for your home system, application, and budget. A key goal in developing the OM cartridges was to give music lovers the ability to optimize sound reproduction without having to replace the entire cartridge. The OM 5 series is not only intended for replacement after wear or damage but also allows you to achieve better sound simply by upgrading the stylus.