Cable / pipe / hose channel for walls

This is a pipe that's designed to go in to a hole, with a cap on either end to prevent foreign matter or moisture from entering a cavity. I made this because I was routing compression hosing through a wall and wanted to prevent moisture and possibly bugs from moving from the inside to the outside of the wall and vice versa. At 100%, the model is designed for a 23mm diameter hole and a 121mm length between the two outside walls. Because the two lock nubs stick out beyond the 23mm diameter, thi