E1545S-C - 1.5" x 4.5" Smooth T Slotted Aluminum Extrusion (Cut To Length)
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4pcs 150mm T Slot 2020 Aluminum Extrusion European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY Black(5.9inch): Amazon.com: Industrial & Scientific
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Amazon.com: 8020, 1010, 10 Series 1 Inch x 1 Inch T-Slotted Aluminum Extrusion DIY Extruded Linear Slot Bar Rail 80/20 (18" Long, Clear Anodize) : Industrial & Scientific
C-Beam 40x80 Linear Rail Aluminum Extrusion Profile