The P8-4040-2N90 aluminum profile measures 40mm × 40mm, with T-slots of 8.2mm. This profile features slots on 2 sides for assembly with other profiles or necessaries, while other 2 sides are smooth surface, offering an aesthetically pleasing and easy-to-clean finish. The P8-4040-2N90, along with the 1N and 2N180, are developed for constructing frames requiring high airtightness and designed for different sections of the frame: the 1N and 2N180 are suitable for intermediate sections, while the 2N90 is suitable for edge sections of the frame structures.