Revision Screen replacement Makoi Drum filters 30m3/hour model 120 microns If you have a drum filter model from the year 2019 early 2020 with a milled edge of 5mm, the new 8mm screen cloths may not fit. These are made of 5mm thick for this. if you have a 50m3 drum or a biodrum, order this cloth twice. You have to cut the cloth to size yourself....