... good quality,excellent service 2,Good workmanship casement window(in-opening and out opening) Materialaluminium profile,.thermal break ... 5mm,5+6A+5mm,etcsurface treatmentoxidation,electrophoresis painted,mill finish,powder coatedAccessoriesMade in China / Germany( Roto, Germany Siegenia, Kinlong)ScreenMetal ... detailed information, please contact us casement window(in-opening and out opening)