Whirlpool 4396013RB Dura Vent Installer Kit for Dryers Venting system allows the wall vent to protrude up to 2-1/2-Inch without having to be trimmed Includes an extension collar to make this kit a universal 4-1/2-Inch clearance Utilizes loop system and DuraSafe patented snap-lock fittings Contains (1) 4-Feet vent section attached to a close elbow and (1) 4-Feet vent section attached to a wall offset elbow