The P8-4040W is a heavy duty aluminum profile measuring 40mm*40mm with 8.2mm T-slots. This profile features slots on all four sides for assembly with other profiles or accessories.
Compared to normal P8-4040 profile, the P8-4040W is heavier and of higher quality. It's primarily used for aluminum profile frames requiring greater load-bearing capacity, such as industrial stair platform and aerospace platform.