I designed this cable pass through big enough to allow the plug for the surge protector to go through. Inside diameter is about 2 inches. This runs the cables through the wall to whatever room/closet is on the other side, these are NOT meant to run cables INSIDE the wall, between the drywall and studs.

The outer part of the tube is the same for either a 4 inch or 6 inch wall, but the inner will be different for each wall thickness. Cut your holes in through both sides of the wall evenly, and these will screw together to hold themselves in place, no screws needed.

I printed in PLA with 20% infill.