Universal Portable Air Conditioning Unit: The window ducting panels can be used with most brands of portable air conditioners. They can be installed vertically and horizontally on all sliding windows, which can be used in combination according to the size of your needs. Two Pipe Lengths for the Ventilation Kit: There are two exhaust pipe lengths for your reference, one exhaust pipe is 59.5 inches long for the portable air conditioner, the other is 79.5 inches long. Please check the pipe length according to your needs. Vertical and Horizontal Use: The window ducting kit is suitable for most vertical and horizontal sliding windows. You can use a 2-plate combination, a 3-plate combination, or a 4-plate combination depending on the size of the window. Convenient to use anywhere. Keep your room cool and save energy: Insert the plates into the window track and tighten them for a good sealing effect, which can keep your room cool during the hot summer, allowing you to work and rest