IXGNIJ 10pcs 48inch T Slot 2020 Aluminum Extrusion European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 1220mm Silver(48inch)

I bought 6 sets of these in different lengths and am highly impressed. Sturdy, precisely formed, cleanly cut, individually wrapped in protective plastic, then boxed. They all arrived in excellent condition, no dings, dents or bends. There were a few minor burrs on the ends from the cutoff saw, but they were so minor 1 or 2 strokes of a fine file removed them. Honestly, if I didn't have a file I could have left them as is--VERY nice!

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.

Worked fine for what I needed it for. A bit pricey though.

Quality is fine, but the hole size in the center is too large to tap and use an M5 screw. All other 2020 or 2040 extrusions I've purchased from others can be tapped for M5. This should be added to the description.

Exactly as described. Packaged great and not a scratch on any of them - most had a protective film on multiple sides and they were all wrapped individually in thin, soft packaging foam. They were able to be cut clean and smooth with my normal medium aluminum miter blade. The silver finish is sharp - unlike the black coated profiles, the scratches from normal cutting and building are practically invisible (they also feel smooth, not like a chalk board like the black coated ones). Probably states this in the description, but will verify in case anyone is curious: - These are T-Slot, not V-Slot - End tap is M6, not M5