Thumb rests for recorders
The Triebert thumb rests work great. They fit various different models or makers of recorders. They are easy to reposition but are secure enough to stay in place without slipping.
Triebert plastic thumb rest
It works on a plastic recorder but there’s a sharp edge which will scratch a wooden one when sliding into place
Serviceable but uncomfortable . Ok for plastic recorders as they’re lightweight anything heavier is not comfortable at all.
No nonsense, five star!