“RADOP” manufactures aluminum joinery of high quality that provides excellent thermo- and sound-isolation by using shaped metals of the Bulgarian company “Stilmet” and the German company Schuco. The aluminum shaped metals are weather-proof and resistant to UV rays; the rubber gaskets respond to the quality of the E.P.D.M. standard and their elastic properties are guaranteed up to 10 years without any modifications. You are able to choose a color due to the two types of cover – the powder coloring where you can choose the color from the RAL catalogue or from anodization. They are with surety quality and stability. The materials and the plate that are used are from the German company “FRANKE ROTO” and they allow all kinds of openings – on a horizontal or vertical axes, combined opening, opening of the type of concertina or sliding.