Description: Flexible design: It is widely used by 98% of the air conditioners on the market and is suitable for all portable air conditioners Innovative shape: PVC clip rail can be installed with various sliding for windows in vertical and horizontal directions, so it can be changed. Flexible use: easy to install 6.3 inches wide telescopic sealing rail, the sealing size of the rail can be adjusted between 17 inches and 55 inches. Quality Assurance: Made of durable PVC light weight material, easy to install and disassemble, and save space when not in use. Energy saving and reliability: The for windows of the mobile air conditioning system are sealed with exhaust hoses to prevent hot air from entering, thereby improving the efficiency of the equipment. Specification: Name: Air conditioner exhaust fittings Material: PVC material Size: about 43-140cm / 17 - 55in (retractable) How to install: 1. Connect the exhaust and the deflector gasket 2. Put the prepared screws into the holes of the hard deflector 3. Adjust the deflector to the required length 4. Fix the deflector on the window, fix the deflector, and then connect the deflector gasket and the exhaust on the deflector. Package Includes: One Set (as shown on the photo)