KLKR small duct incl. cover with turning bolts KLK small duct incl. cover BKTE 110 floor duct telescope insert, height=110 mm BKTE 100 floor duct telescope insert, height=100 mm BKOS 110 not perforated, height=110 mm BKOS 100 not perforated, height=100 mm BK 100 perforated, height=100 mm
