The P8-4080-1N aluminum proflie measures 40mm*80mm with 8.2mm T-slot and 2 mounting holes. This profile features slots on three sides for assembly with other profiles or necessaries (The 80mm surface has 2 slots and each 40mm surface has one), while one of 80 mm side is a smooth surface, offering aesthetically pleasing and easy-to-clean finish. The P8-4080-1N profile shares similar appearance and weight to standard P8-4080 profile, suitable for aluminum frame requiring high strength. But compared to standard 4080 profile, 4080-1N features one side without T-slot, making it more suitable for structure on outer side of frame.