YOTINO 5PCS Flexible Couplings 5mm to 8mm NEMA 17 Shaft Coupler for Creality CR-10 CR-10S S4 S5 Makerbot RepRap Prusa i3 3D Printer Or CNC Machine(Bonus 1pcs M3 Allen Wrench)

These seem to work great!!!

I bought it to replace the old and stretched coupler on my Tevo Tarantula. They are pretty much the same as the stock one. The improvement in quality is noticeable, probably not because of the quality of this product (don't get me wrong, they are great) but because my old coupler is quite damaged. If you are having z band issues, this could be the problem. Left tower was printed with the old coupler. You can see the difference compared to the one on the right

Am I missing something. How does 5mm shaft stay centered? Otherwise I am pleased with the product

Decent quality worth buying using with my servo motors on my Tronxy X3 and have good results with it so yes I recommend to other buyers.

Haven't had a chance to use yet.

I used to have threaded rods which would translate to my prints causing z-banding, but once I finally installed these and also re-tuned my steps. The print quality was definitely improved

I liked that they were very flexable and should work well with the higher torque moters we will be pairing them with.

Low quality aluminum; way to soft for a Z axis on a printer