The Bold-Line system consists of a series of sash profiles with a rounded shape to be used on the frame of the Coplanare system to allow the use of double glazing instead of triple. The result is a harmonious shape that enhances the sinuous shapes of the aluminum profiles.

frame: 68×70
door: 68×81

Softwood: Uf = 1.4 W/m²K
Hardwood: Uf = 1.7 W/m²K