- 5.1 inch diameter portable AC exhaust hose with anti-clockwise thread direction. Check compatibility with your air conditioner parts and accessories before purchase. - Adjustable length: expands up to 80 inches to reach through walls or windows and can be shortened to 15 inches for compact storage. Flexible hose extends to fit the space you need. - Long lasting universal fit: polypropylene construction reinforced with steel wire to prevent kinks or collapse. Compatible with a wide range of portable AC brands including LG, Honeywell, Whynter, Frigidaire, Toshiba, Delonghi, and many others. - Easy installation: extend the hose to connect with the vent on the back of your portable AC unit. Line up the front of the hose extension with the unit specific coupler, then twist anti-clockwise until it snaps into place. - Applications: vent through a wall or window to exhaust hot air, position the unit away from the vent for flexible room layout, and retract to 15 inches for easy storage when not in use.