Source 2020 4020 20x60 2060 extruded v-slot bars silver black color aluminium extrusion v profil aluminum profiles on m.alibaba.com
500mm T Type 2020 Aluminum Extrusion Profile European Standard Anodized Linear Rail Guide (4PCS 500mm (19.7inch), Black) - Walmart.com
Source Structural 2040 4020 extruded 20 x 40 aluminum alloy t-slot 20x40 t slot extrusion profile on m.alibaba.com
2040 Aluminum Profile Extrusion European Standard Anodized Linear Rail Aluminum Extrusion 4020 Profile for CNC 3D Printer Parts - AliExpress
20-2040 | 20mm X 40mm T-Slotted Profile - Six Open T-Slots
10PCS V Slot 2020 Aluminum Extrusion European Standard 1000mm(39.3'') Length Anodized Extruded Aluminum for CNC DIY 3D Printer and Industrial Bracket Making: Amazon.com: Industrial & Scientific