The DuraFilter FCC - 50 is a disposable filter cartridge used as a main filter in mobile and stationary welding fume extraction systems. The filter cartridge is built of cellulose fibers. It is shaped into a square profile and provided with cardboard corners. The special construction (pleats) and the embossing of the filter medium guarantee an equal air flow over the filter. As a result, the pollution is equally divided over the entire filter surface. The welding fume particles are collected on the inside of the filter cartridge. When it is saturated, it needs to be replaced.