4 Piece 400mm 20 Series Aluminum Extrusion Profiles 2020 European Standard T Slot Rails For DIY 3D Printer Parts CNC Router And Robotics Frame Building Linear Rail System With Precise 20x20 Cross Section For Pro Grade Builds

Four 400mm 20 Series Aluminum Extrusions for DIY Frames
✔️ 4x400mm 20x20 2020 aluminum extrusion profiles, black

These 2020 series aluminum extrusion rails offer a precise 20x20 mm cross section, designed for sturdy DIY frames in 3D printers, CNC routers, laser cutters, and robotics projects. Each piece measures 400 mm long with 5 mm end holes that are not tapped, letting you tap or attach using standard connectors. A protective film keeps surfaces safe during shipping and handling.

✅ 4 pieces, each 400 mm long, 20x20 mm cross-section
✅ 2020 series T-slot rails, black finish, protective film to prevent scratches
✅ End holes are 5 mm, not tapped by default for user tapping if needed
✅ Widely used for building industrial frame structures, 3D printers, CNC routers, robotics

💡 What is a handy use for 20x20 aluminum extrusion rails in DIY robotics and printing projects?

These profiles provide a modular, expandable framework that adapts as your project grows. - Lightweight and rigid framework for printers, CNCs, and robotics - Compatible with standard 2020 series connectors and T-slot hardware - Quick assembly and flexible layout for future upgrades - Surface protection film minimizes scratches during transport✝️