Fenster-Systeme
- AluK Belgium Hamme (Belgium)
- Aluminios Cortizo Padrón (A Coruña) (Spain)
- Aluplast Karlsruhe (Germany)
- AMBC 2nd Gen Fiberglass Window Sint-Maartensdijk (Netherlands)
- AMCovering Wielsbeke (Belgium)
- Aug. Winkhaus Telgte (Germany)
- CORTIZO Padrón (A Coruña) (Spain)
- Deceuninck Benelux Hooglede-Gits (Belgium)
- Forster Duffel (Belgium)
- GEALAN Fenster-Systeme GmbH Oberkotzau (Germany)
- GEZE Eindhoven (Netherlands)
- GRETSCH-UNITAS Belgium Brasschaat (Belgium)
- Hansen Głogów Małopolski (Poland)
- ISORA Alu-Systems Oudenaarde (Belgium)
- JANSEN NL-BE Breda (Netherlands)
- Kurtoglu Bakir Kursun San AS Terikdag (Turkey)
- LoCra Kuringen (Belgium)
- MACO Beschläge Zelhem (Netherlands)
- Reynaers Aluminium Duffel (Belgium)
- ROUNDAL Eeklo (Belgium)
- SAPA by HYDRO BUILDING SYSTEMS Landen (Belgium)
- Sunparadise Deinze (Belgium)
- Ursus Eeklo (Belgium)
- VEKA Sendenhorst (Germany)
- WINSOL Izegem (Belgium)