Compatible with all portable air conditioners and tumble dryers - You dont have to buy window kits, adapters for your hose or additional tools. Universal window seal - Application for windows that open to the left or windows that open to the right, bottom hung windows or skylights(not sliding window or door). Easy to install to the window and the hose - Come with strong adhesive tape, no tool or drilling needed. Easy to remove - once the weather turns chilly, just remove the seal and store it away for next summer! Easy to Install Start from aligning the middle of window seal with the middle of window casement (Red Dots). Attach wide side (Red) to the window frame Attach narrow side (Blue) to the window casement Open the zippers on the window seal. Place your air conditioner hose out of the window. Close the zippers tightly around the hose. No Damage to Window No Punching. The window seal is sticked around your open window, locked the hose between the window frame and the window itself without drilling a hole on window for exhaust hose. Warm Tip - If theres a gap between the window frame and window casement, its necessary to seal 4 sides. If not just need to seal 3 sides. Please measure the size of your window and check your window type before purchasing. If your window seal leave excess material, you can overlap and stick the excess material at the ends to make it look neat.