V-Slot 2020 Extrusion, Linear Rail 500mm (4pcs). T Slot Aluminum Extrusion for Framing, with V Type Slot Upgrade for 3D Printer Parts, CNC Rail, Linear Motion Slide Rails (Black 20x20 Extrusions)

One word to describe my last (2) purchases with this new brand: FLAWLESS-Quick delivery, well packaged-V Rails are triple wrapped to preserve finish, which in my opinion, is of superior quality. Perfect endings, super straight, nice cuts.-High end stainless steel hardware is a great bonus too.-Even the Prefero box is well built demonstrating the extra attention to detail throughout.-->In my view, all in all, this makes a flawless product and a desired purchase.Thanks PREFERO.

Exactly as described. Arrived in perfect condition due to the careful packaging. Each rail wrapped separately in plastic and then all 4 wrapped again. Then neatly packaged in its box. This box was delivered in another box. Ends are very cleanly cut and each piece perfectly straight.

It was exactly what I needed for my 3D printer project

I ordered a 4-pack of these as I was short a few for a new project. After opening the box, I realized how well the rails were packaged. The 4 rails were individually wrapped in plastic the wrapped in foam as a group. Perfectly appropriate packaging for such a product. Very pleased. The only negative to the packaging was the smell of the plastic wrap. Very stinky, so it immediately went into the outside bin.

Well made, and well packaged. Excellent for the price. Quick delivery.

Well packaged and look to be nicely extruded. However, for the 500mm set of four, one of the pieces was actually 3 mm longer than the other three and will require some hand trimming to get it to align well with the other three. On top of that, one of the pieces looks to be slightly bent or bowed out. Not sure what I am going to do with the bowed piece and may try to use it, but I will have to check to see if it affects the travel accuracy. I guess pretty good value for the price, but a pain to trim up.

No nicks, no burrs. Dimensionally correct from start to finish. Would definitely get more if I have a need for 500 mm pre-cut (Which will be the case...) extrusion pieces.

Good product but the screws never arrived with the product