Frame section 68×85 and sash section 86×78 made with glued laminated solid wood with extruded aluminum covering profiles on the exterior side, with double acoustic seals. Corner Junction node to 45 ° (patented). Glass 28mm on request 44mm, for an excellent thermal and acoustic insulation. Symmetric central mullion. Flush mounted extruded aluminum covering profiles on the outside (RAL colors or anodized).