This 45 degrees corner connecting extrusion is designed to connect 80mm square extrusions, it can be used both for 45 degrees connection and for 135 degrees connection, its material is aluminum alloy and this profile has three system grooves, the width of the groove is 4.3mm, thus it can be compatible with system profiles. When this post is used with 80mm square upright, it can realize some special-shaped booths, and it also applied to some entrances of the pavilion and galleries. By adopting the German standard, the quality of Lingtong’s products is well accepted by European and American customers.