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smooth, easytoclean surface; beveled frame and sash provide drainage; the profile system is ecofriendly and recyclable; possibility of installing burglarproof hardware. Construction depth:60 mm Number of chambers:3 chambers Maximum pane thickness:max. 32 mm Total cross section width (frame+sash):116 mm Thermal transmission coefficient:Uf = 1,6 W/m2К Thermal resistance coefficient:Rf = 0,65 m2К/W Sound insulation: Rw,P = 41 dB Burglary prevention:max. class RC2 (ENV 1627) Seals:EPDM / 2 double seals