Apple Magic Keyboard model A2038. For 10.9" iPad models:

11" iPad Pro (1st, 2nd, 3rd, 4th gen)

iPad Air (4th, 5th gen)

This is used. I purchased an iPad Air that came with this, but I don't need the keyboard.

Functionally, it works perfectly. It has some cosmetic wear, mostly the leather slightly peeling in the corners (see photos).