19mm Aluminium Window Section refers to a specific aluminium profile that measures 19mm in width or thickness, designed for use in window frames. This section is a key component in the construction of aluminium windows, providing a lightweight yet durable framework that supports the window glazing, while ensuring strength, weather resistance, and aesthetic appeal. 

22mm Aluminium Door Interlock Section refers to a specific aluminium profile designed for the interlocking mechanism of door systems, particularly for industrial, commercial, and residential applications. The "22mm" indicates the thickness or width of the section, which is an important dimension for ensuring a secure and functional interlocking door system. These interlock sections are commonly used in sliding or hinged doors to provide a seamless and secure closure.