1.profiles:LG, CONCH,VEKA 2.characteristic:outward window 3.hardware:handle,friction hinge,transimission 4.color:white 1.features:two ... panels ,casement window,mullion,white2.profiles:LG of Korea,VEKA ... 4.chambers:3,4,5,6,,excellent heat-insulating effect4.hardware:handles,friction hinge,transmission(ROTO or China famous brand) ...