4PCS T Slot 4040 Aluminum Extrusion Profile 39.4'',European Standard Anodized Linear Rail for 3D Printer Parts and CNC DIY 1000mm Silver(39.4inch)

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.

Cost/finish/price - perfect!

Got what I ordered in a very timely manner.

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

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.

Strong enough to build a full iracing sim rig.

The outside dimensions are 4040 but the T-nut slot is very deep. Much deeper than any T-Nuts I could find. I read this is so they can use less aluminum. I have had to use it and it takes care in trying to make sure a T-nut is lined up during the tightening process since if it were the correct depth it would automatically align. If you're using Monstertech extrusions, these are not what you want. All measurements are fine except the track depth is an 1/8" too deep.