Amazon.com: 1.20" ID Cable Pass Through Wall Port 3 5/8" - 5 1/4" Wall Thickness (White) - Pass Cables from one Side of a Wall or Barrier to The Other. : Electronics
Didn't like the exposed hole left from running an Ethernet cable too my room, so I made collar for the wall. : r/functionalprint
Cable Gland - Waterproof RJ-45 / Ethernet connector [RJ-45] : ID 827 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Vanco Spring Lock Cable Pass Through Wall Covering - Dizztribution
In-Wall Power & Cable Management Kit
Network cable ethernet LAN RJ45 UTP 24 AWG Ultra flexible Cat. 6A green 25 cm - Cablematic
Single Feed Thru Bushing - (White) RG6 Feed Through Bushing (Grommet) – THE CIMPLE CO