48”Aluminum Extrusion Profile Black 4040 T-Slot, European Standard Anodized Linear Bar Rail Framing 1220 mm for 3D Printer Parts, CNC Routers (4 Pack)

Good quality extrusions for home project. Reasonable price. 4 sides are taped, so no scratches. 4 of them packaged together nicely.

They are exactly as advertised.

This 4-pack of 4040 extruded aluminum arrived quickly and well-packed. All of the sections were 600mm and had clean cuts. No jagged cuts. Each piece was individually wrapped to protect the surface finish, and the 4 sections were affixed to one another by two pieces of tape in order to prevent the pieces from scratching each other. I'm very happy with these items and the care that was taken to deliver them to me. I plan to purchase more 4040 items from the seller in the months ahead.

Showed up exactly as described. Nice and heavy duty. I took off a star because the sticky plastic to help precent scratches in the finish was FULL of aluminum metal shavings. Definitely don't want to open this up any place you won't mind a whole bunch of aluminum. Probably what I should expect for the price but definitely made a mess to cleanup inside.

These are standard "Light" profile 4040 extrusions. The sections are thin with a low total weight per inch. I would not use these for heavy load applications.That said they appear to be accurate and smooth and straight. Unlike the photos the ends are not anodized but are raw from a saw cut. So you may need to deburr these before using.Fine utility parts for light-duty work such as windows or machine enclosures. I intend to use these for a small robot enclosure with plastic windows.Recommended.

Nice build. These extrusions are robust and well manufactured. I'm extending out a platform on our campervan and these are sturdy enough to support several hundred pounds on the platform. No sharp edges. Good overall finish to the aluminum.

dented and damaged go figure.

These showed up with some of the worst cuts I've ever seen on an extrusion. Corners are misshapen, faces have missing chunks / raised surfaces, and overall these are going to have very poor mating surfaces and be hard to square up.