Mini Propeller Blades, 20 Propeller Props Suitable for Remote-Controlled Aircraft Quadcopter, The Propeller of UAV is 1.81 in Long and The Axial Aperture is 0.03 in.Propeller Parts

I had to return these because I ordered the wrong shaft size. I took off one star because I am not sure if they were packaged correctly. Props in the same bag had different numbers but the same color and same orientation.

This is a pack of 20x 46mm propellers. There are numerous rebrands of these floating around in the wild.With that being said, these little things are remarkably durable. As an example, one of my test setups has me spinning them at 80,000rpm.Not a single one has shattered, or broken, to date... Though they do tend to generate quite a bit of noise at that speed.For those interested in more technical numbers, the tips are traveling at just over mach 0.56, roughly 431mph.Though it may have been faster, as my tach was pinning at 80k. That's still approximately 1,330 rotations per second.I have absolutely put these little guys through their paces, and am thoroughly satisfied with their performance.In my opinion, these are the staple propeller of this size. I use them for many of my smaller aerial projects.I would definitely recommend them. They've survived everything I've put them through, and continue to perform above and beyond expectation.