This Portable AC Exhaust Hose Connector is compatible with most standard portable air conditioner exhaust hoses, meeting interface connection needs for various mobile AC models. Precise 5.91-inch diameter of Portable AC Exhaust Hose Connector ensures proper fit; users are advised to confirm their duct interface size before installation for optimal performance. Portable AC Hose Extension is engineered specifically to extend mobile air conditioner exhaust hoses, accommodating diverse installation scenarios and space requirements. threaded design on Portable AC Exhaust Hose Connector creates a tight, stable connection between portable air conditioner hoses, minimizing air leakage and loose fittings. Constructed from hard plastic, Portable AC Hose Extension resists wear and maintains structural integrity for long-term use with mobile air conditioners.