E40-4040-C - 40 SERIES 40mm x 40mm T-SLOT ALUMINUM EXTRUSION(Cut To Length)
40-4040-Black-FB | 40mm X 40mm T-Slotted Profile - Four Open T-Slots
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Black 4040 Aluminum Extrusion Profile European Standard Linear Rail 4040 Aluminum Profile Frame Machine DIY 3D Printer Workbench CNC (400mm) 1PCS: Amazon.com: Industrial & Scientific
4040 Aluminum Extrusion Profile European Linear Rail for DIY CNC 3D Printer | eBay
Aluminum Extrusions, FXIXI Black 1000mm Length 4040 Aluminum Profile Extrusion Frame for CNC: Amazon.com: Industrial & Scientific
Black 4040 Aluminum Extrusion Profile European Standard Linear Rail 4040 Aluminum Profile Frame Machine DIY 3D Printer Workbench CNC (400mm) 1PCS: Amazon.com: Industrial & Scientific