Purchased these for my printer but ended up giving them to my son to use on his. Now his Ender3V2 prints better than mine. I was surprised at how rigid the orange material is, which is why I ended up using the more standard flexible couplings on my printer. But once my son installed them on his printer, they allow quite a bit of movement. I was surprised. If you're experiencing Z wobble/banding, these definitely help. In my son's case, they fixed the issue entirely. I kinda wish I had used them now, and given him the more standard flexible couplings. But I'm sure they both work well.

The orange flex material is pretty stiff which surprised me. I switched from the spring type adapter because my old ones had center setscrews which easily damaged the leadscrew. My replacement adapters have screws, that, when tightened, pinch the adapter closed tightly around the leadscrew and therefore doesn't cause any damage to the leadscrew. After closely inspecting and realigning everything related to the 'Z', these adapters seem to be performing very well. No regrets so far.

Definately save nozzle ends if contact buildplate