Product designed to fit into 4.25" drilled hole for cable management on office desks. Outer ring is 107mm OD with barbs to grab sidewalls of the hole. Keystone jacks provide flexibility to pick and choose from a wide array of commercially available connections types (such as RJ-45, RJ-11, USB, and more). Product was made with Tinkercad. Edit it online https://tinkercad.com/things/lhJXtl3pa0c