Amazon.com: Aluminum Extrusion Rail Kit, 4PCS 2020 European Standard Anodized Linear Rail, T Slot Square Metal Profile Bracket with Inner L Bracket for 3D Printer Parts and CNC (7.87IN) (200mm) : Industrial
Aluminium ruler scale cm/inch: with non-slip coating guarantees precise measurement thanks to a fine flat edge guide (30 cm) : Amazon.de: Business, Industry & Science
3030 2Pcs Aluminum Profile European Standard Anodized Linear Rail 2Pcs 600mm(23.6 inch) Linear Rail Standard 8mm T Slot for DIY 3D Printer Workbench: Amazon.com: Industrial & Scientific