JJ4 wood-al is a high quality wood-aluminum window suitable for all tastes for it is a bind of modern and traditional. Technical details: - Wood: fir/ spruce, larch, oak, meranti - Color: Renner, by customers order - Glass: 32mm, Ug= 1, 4-0.8W/ m2K, Uf= 1, 4-1, 6W/ m2K, Rw= 34-32dB - Iron components: Roto - Gascet: 3x - Aluminum profile: Olimpia-Italia