- for circular pipes - supplied without filter insert - designed for MFR G3 pocket filter (ISO coarse 50%), M5 (ISO coarse 80 %) or F7 (ISO ePM10 75 %) - the cartridge is equipped with a special lid with locks and pressure to ensure tightness - it is made of galvanized steel with a rubber seal for connection to the pipeline - the frame with the filter can be removed after releasing the locks on the lid - MFR - replacement filter insert