This Pro Aire® portable A/C replacement window exhaust vent kit includes a 5.13-inch diameter hose, adapter, and sealing board. This kit is ideal for single-hung, double-hung, or sliding windows, and is compatible with both clockwise and counterclockwise hoses to connect to the coupler on the back of the portable air conditioner. The original adapter created to connect the portable A/C unit to the hose is not included, and will be required in order to complete set up! This kit is compatible with most portable air conditioner models.