Potentiometer question

Potentiometer question

Does this look okay?

They look like they’ve got metal shafts but I find that hard to believe at the price he’s selling them for. I want to use them with this:

http://midi-hardware.com/POT32

(the manual states that 20k Linear Potentiometers are required…

should be okay?

Looks like solid potentiometers! If the specs match they should be OK.