Universal AC Exhaust Hose – Designed with a 5” diameter and 78” length, these versatile air conditioning hoses can fit a wide range of compact, portable AC units. Counter-Clockwise Threads – These portable air conditioner exhaust hoses feature counter clockwise threading that helps it seal tight to ensure safe discharge. Long, Flexible Design – At 78” in length our AC exhaust hose can be extended or collapsed to give you the ideal length without leaving excess that takes up space. Heavy-Duty Polypropylene – A premium replacement hose for multiple portable air conditioner types, the durable, puncture-resistant material provides long-lasting use. Quick and Easy Installation – These hoses can be attached to your unit via a coupling piece and run up through a window in your home or office while creating a seal.