[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.[UniversalClockwise 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.[Durablematerial]Made with hardend plastic, so it is durable and strong enough to your AC hose connection.Isolate the exhaust air from your room.[ExtendYour 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.