There are different versions of these, I used some when I ran home theater wires through my walls. Photo is grainy as I zoomed in.

https://imgur.com/a/1e21tZR

https://www.amazon.com/gp/product/B07579PXVW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Edit: I just searched “feed thru bushing” on Amazon and there are tons of choices.