KF 300 is Internorm's most proven UPVC or UPVC/Aluminium window with more than 2.3 million sold window units. KF 300 convinces with superb thermal insulation and the gapless all around gluing of the Glass pane. The harmonic design with rounded edges of frame and sash creates a cosy atmosphere in each room. KF 300 is available not only in the aluminium clad version, but also in the classic UPVC white version. Three continuous Gaskets protect the inside from the wet and ensure improved thermal insulation and sound reduction.