OUYZGIA 2040 Aluminum Extrusion 350mm 14 inch V Slot 2040 Extrusion for Building 3D Printers CNC Machine (V Slot 2040, 14 inch, 350mm, 2pcs)

Good quality, decent price, and accurate length. Also, all 6 side are anodized. I would (will?) buy them again.

Its 2020 v-slot aluminum. The nuts I used with it fit fine, I didnt compare pricing with any other sources, but it worked perfectly for my needs.

Great pacakaging. Nice and clean. No metal shavings.

I’ve bought a lot of silver anodized 20 x X (40, 60 and C type) and never encountered quality like this before! Exactly (ok I do not have a vernier or micrometer this large but…) the same length, I bought two 500mm pieces and stood them side by side on my surface plate. With 10x magnification I could not discern any difference in length, nor could I see any machining marks where they had been cut! There were between 2 and 4 tiny burrs evident within the profile on one end of each piece, and they were insignificant and did not extend beyond any contact areas that would negatively impact any build or joint. On both pieces the ENDS were also anodized, I have only ever seen raw aluminum on end faces in the past, and I have bought quite a few lengths from other vendors! T nuts, both drop in and sliding, fitted perfectly and were standard 5mm size, plus the pilot holes in the ends were 4.2mm and perfect for 5mm x 0.8mm tapping. Great quality and added to my favorites for minimal cut builds for CNC and 3D printer projects I have in mind.

Supposed to be 600mm and these measure 599mm. Also, the packaging is insufficient - you can see one arrived with damage on the end.

The ends are anodized, seems to be good quality and a good value.

These aluminum extrusion pieces are accurately cut and beautifully finished. They work very well for custom 3D printers, CNC machines, laser engravers, etc. I highly recommend them!

This is very standard 2020 V-Slot rail, but it appears to be of good quality, with a good surface finish with no scratches. All 4 pieces were perfectly straight and had no apparent leftover metal shavings anywhere that I could see. Additionally, it even had a nice black finish on both ends, which is often not the case. When measured, it was also dimensionally accurate to within a hundredth of a millimeter -- which is VERY good. I would expect this to work great in either a 3D printer or CNC machine. The only reason I am not giving this 5 stars is because it is a bit pricey for what it is, but the quality is excellent and may be worth it if you are looking for something with a really nice, smooth finish.

These are sturdy extrusions. I have used them in a few projects. they are strong. the black finish is a nice touch. They are also cut to the right size from the start. 5/5

I got these as part of the modifications to my tronxy x5sa-400, slowly transitioning toward a VZ-bot 3d printer. The extrusions are cut precisely to 600mm and matched up to the tronxy factory frame exactly. These would be great replacement for damaged rails, or if you are building your own 3d printer frame from scratch.