MengQi 1pc 1000mm 4040 8mm Slot Aluminum Profile, 4040B European Standard Anodized Extrusion for DIY 3D Printer and CNC Machine: Amazon.com: Industrial & Scientific
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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
SANTIE 1 PCS T Slot Aluminum Profiles 40mm x 40mm with 8mm T-Slot Cut to Length 400mm,Silver 4040 Aluminum Extrusion Profile European Standard Linear Rail 4040 Aluminum Profile: Amazon.com: Industrial & Scientific
Series 40 Aluminium Profiles | mk Technology Group