E40 is a thermal insulated system suitable for the construction of all types of opening frames. Its innovative variable wall thickness design gives the system extra structural durability and stability by using more aluminum where it is most needed. Durability and thermal insulation are achieved at the best cost efficient way. With a wide range of profiles and design flexibility of both straight line and round contours the end user benefits from the system’s aesthetic alternatives and contractual capabilities, all at an affordable cost.