I put a CAT6 cable out the back of my house and needed a cable grommet I could attach a UV cable shield to (I don't like the idea of CAT6 in the sun). Found and remixed an existing cable grommet to add a section of pipe at a 90 degree angle to face downward.

Print both halves and sandwich over the cable. Secure the uv shield with a cable tie. Push the barbed end of the grommet into the hole in the wall with a bit of caulk.