4PCS T Slot 4040 Aluminum Extrusion Profile 19.7'',European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 500mm Silver(19.7inch)

I used two of these to create supports on my Trak Racer monitor stand to mount a shelf for my PC, and they worked perfectly. The quality is right on par with the pieces from Trak Racer, and the finish is essentially identical, so it blends in perfectly. The T-slot channels are a little bit deeper than the Trak Racer pieces, so the T-nuts don't hold quite as securely in them, but that wasn't an issue for my use.

I bought these to attach Ford Focus ST seats to my Simlab P1-X Pro racing rig. I wanted a real car seat with adjustability, but how to mount them? These worked perfect; used angle brackets and hardware I also got on Amazon and it worked perfectly. If you use a different car seat make sure the mount points are all on the same level and angle.

Cost/finish/price - perfect!

Arrived in good packaging, wrapped in plastic, no damage no scratches. Very pleased.

These ones have a slight different slot fitment than the standard 80/20 bars. So hardware might be a bit floppy at first. Once tightened though they works exactly as expected. Great lower cost and readily available solution.

This is a copy of similar European profile. The original profile is much heavier and stronger. The slot is 12.25mm deep, to compare to this profile - 14.2mm. Inside dimension by original is 15.5mm here is 11.5mm. The walls are thinner too. Out of this reason the Slot Nuts Roll-in Spring Ball doesn't fit well.Price and quality is not bad.

Sizes correct, worked great for my use case driving simulator.

Got what I ordered in a very timely manner.