[Size]5.9 inches is compatible with the portable air conditioner with 5.9 inches inner diameter exhaust hose. NOTE: measure your hose size purchasing.Fine workmanship and perfect style.[Universal Clockwise Counterclockwise Threaded Design] AC vent hose coupler is speccially designed to support both clockwise counterclockwise threaded. You never need to worry about installing it in a wrong direction.[Durable material]Made with hardend plastic, so it is durable and strong enough to your AC hose connection. Isolate the exhaust air from your room.[Extend Your Exhaust Hose Anywhere]This AC hose coupler is convenient to extend the exhaust hose to you . Enjoy the coldness in the hot .Material: plasticColor: as shownPackage Contents:2 x ConnectorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.