A cable tidy for the iMac 21", so its the slim 2017-2020 'tapered edge' model before the new pastel colored square ones came in

Cable tidy is just that;

One side is a power cable relief so you hook through with a bit spare and it stops you accidentally pulling out the power when moving the iMac (swivelling, tilting) etc

One side has loops to zip-tie up the cable excess if you have lots of cables as I do and a nosy/playful cat

just print in PLA, hang over the iMac stand and slide down to fit

Creality

Ender-3 S1 Pro

Yes