P6-2020-3N profile measures 20mm*20mm with an internal M6 mounting hole. This profile has a single 6.2mm T-slot on one side for connecting to other profiles, while the remaining three sides are flat surfaces.
P6-2020-3N, 2N90, 2N180 and 1N profiles share similar strength and weight with standard 2020 profile, both are suitable for lightweight frames with lower load-bearing requirements. but the smooth flat surfaces of N profiles make them more suitable for being installed on the outer structures of frames to ensure the aesthetic appeal of the overall structure.