The pre-filter set 230 from Magni is an essential addition to the filter series 230, designed for respiratory masks. This set includes a pack of pre-filters 2003/90 as well as two pre-filter clamps: the 230 P, suitable for particle, gas, and multi-purpose filters from the 230 and DIRIN 230 series, and the 230 GP, which can be used for combination filters and multi-purpose combination filters from the same series. The use of pre-filters increases the efficiency of respiratory masks by extending the lifespan of the main filters and optimizing filter performance. Made in Italy, this set offers a reliable solution for protection in various work environments. It is important to choose the right filters and holders to ensure the best possible protection. Therefore, the pre-filter set 230 is a practical and necessary component for anyone working in areas where respiratory protection is required.