Aluminium T slot Extrusion 40x40 application for aluminium profile is aluminum Workstation, Trolleys, Racks, Fences etc. It can be easily modified and assembled by anyone. We supply all sizes of Aluminum Extrution's from 20 x 20 to 90 x 90 And Rexroth brand is well known for his quality and strength. We also supply IBK brand 40 x 40 T-slot aluminium Profile extrusion Part number is IBK-4040-AP.