The principle of the FEDDEM dual brush assembly for cleaning has now proven itself in installations throughout Europe. The two brushes are driven centrally via a distribution gearbox and can be inserted into the figure-8-bore of the twin-screw extruder at operating temperature after the screws have been removed. This considerably reduces cooling and heating times of the extruder and minimises the downtime of the line during product changes. The distribution gear and the diameter of the brushes are matched to the centre-line distance and diameter of the figure-8-bore of the target extruder. Our dual brushes are currently available for extruder sizes from 43 to 93 mm.