<b>Simple installation steps:</b><br> 1. Install the screw and nut fittings on the outer plate to assemble, insert the oval metal piece into the track, and tighten the nut.<br> 2. Install one end of the exhaust hose on the coupler of the portable air conditioner.<br> 3. Install the other end of the exhaust hose on the coupler of the plates, and install the coupler on the plates.<br> 4. Fix the plate kit on the window and it can be used.<br><br> <b>Warm tips:</b><br> Please check your window or slide door height before buying.<br> Please apply for exhaust hose of counterclockwise.<br> Please check hoses' outer diameter/adapters' internal diameter before buying<br> Please allow slight dimension difference due do different manual measurement.<br> Due to screen resolution difference, the items' color may be slightly different from the pictures.<br>