120mm PC Fan 4" Duct Adapter

This adapter has been designed for use in custom PC applications. It is compatible with 4" flex exhaust & Dryer vent hose available at most hardware stores. Use this to pipe cold air from the front of your case to critical components. Additionally you can use a second adapter on the other end for a cold air water radiator cooling application. This item has been optimized to use as little material as possible, while still maintaining the necessary structural rigidity to support a 4" hose and clamp.