3" ID Cable Pass Through Wall port that fits a Wall Thickness of 7" - – Wall Eye Solutions
What's a Wall Plate Cable Pass Through? | Family Handyman
D.I.Y. Cable Pass Through - YouTube
Amazon.com: ZEXMTE 2-Pack Brush Wall Plate White Wall Mount Panel Wall Plate Cable Pass Through Insert for Wires,Speaker, Cable Wall Plate for Coaxial Cables, Home Theater Systems,Size 1-Gang 4.50" x 2.75" :