The GJ4027F is high quality aluminum profile, it is used to make AHU framework, to enhance the performance of the AHU.
Each profile will joint together by the 3 way corner and jointer, which usually made out of nylon, while the aluminum corner is also available according to customers' requirements.
The aluminum section profiles are available for different sizes and suitable for various panel thickness.
For example the model GJ4027F, means the width of the aluminum profile is 40mm, and it's suitable for 25mm panel.