Fischbach plungers guarantee optimal functioning of the cartridge packaging system. When correctly filled, the plunger continues to seal and protects the cartridge fill material from environmental conditions. The spreading lip system developed by Fischbach ensures that the cartridge is completely emptied. During extrusion, the extrusion gun causes the thrust diameter to be enlarged and effectively scrapes residue from the cartridge walls. Fischbach plungers can be worked both manually and automatically.