40-4040 | 40mm X 40mm T-Slotted Profile - Four Open T-Slots
Profilé aluminium 40x40 fente 8 mm Type I
Alloy V Shape Open Extruded 40X40 Profiles 30*60 Aluminum Extrusion T Slot Aluminium Bar - China Aluminium Profile, Aluminum Section | Made-in-China.com