... wood composite window & door 1.high quality,competitive price 2.sound insulation ,heat insulation, damp proof Specification:1) This 70 series wood ... : Top-grade aluminium sections in 6063-T5, cladding with solid wood. 2.Surface treatment: Anodizing, electrophoresis, powder coating, PVDF, ... High quality made in Germany (ROTO or SIEGENIA). 70 series wood aluminum composite inward open door and window