Wood cartridge filter with eight PTFE-coated cartridges for vacuuming large quantities of all types of wood and fiber dust. Both the coating and its special geometry effectively prevent the filter from clogging. For the first time, this makes it possible to vacuum fiber dust without using filter bags. The wood filter is resistant to moisture and rot, certified for dust classes M and L, and guarantees a high dust separation rate of 99.9%. It is suitable for use with all new single-motor wet and dry vacuum cleaners with the Kärcher Tact system, such as the NT 30/1, NT 40/1, and NT 50/1 models. The Wood version features a brown label to avoid confusion with other filters.