4pcs T Type 2020 Aluminum Extrusion 11.8'',European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 300mm Black(11.8inch)

I ordered two 4-packs of the 600mm (23.6") silver extrusions to frame out a custom, heavy-duty sliding under-desk keyboard tray. Build Quality & Finish • Straightness: All rails arrived perfectly straight with zero bowing or twist, which was critical for ensuring smooth, bind-free linear slide movement. • Surface & Cut Ends: The silver anodizing is clean, consistent, and scratch-resistant. The factory cut ends are square and clean with minimal burring, meaning very little prep was needed before bolting things together. • Slot Fit: Standard European-spec 20-series hardware (drop-in T-nuts, roll-in spring nuts, and standard M4/M5 hardware) slid into the slots without binding or excessive play. Shipping Experience There was an initial fulfillment mishap where two boxes arrived, but one box was completely empty. However, Amazon customer service resolved the issue right away and sent out a replacement set without hassle. Once the replacement arrived, the build came together quickly. The 2020 profile provides plenty of rigidity to eliminate bounce and sag under hand pressure while keeping the keyboard tray assembly lightweight and low-profile. A solid choice for 3D printer parts, desk attachments, or general maker builds.

These aluminum extrusions are accurate to the stated dimensions, and well machined. I used them to add linear rails to a 3D printer, and found them to be straight and free of any warping or manufacturing issues.

Great quality product and the sizing was exact. It can be used in many different way.

Good quality, great price! Useful for my home projects.

Très bien usinés et à bon prix. Installé pour réaliser une pergola en extérieur.