Universal Coupler Fits both clockwise and counterclockwise threaded hoses. Durable PVC Material Waterproof, UV-resistant material. Extra-Thick Seal Tape Prevent outside air from leaking into the room. Installation Steps Step 1 Install the screw and nut on the fixed plate and tighten (do not tight completely.) install the fixed plate to the adjustable plate by sliding the screw kit into the groove of the adjustable plate. Step 2 Install the hose on the coupler, then attach the coupler to the plates. Match the coupler with the end of the plate and snap it into place. Note: The exhaust hose is not included with this item. Step 3 Attach the exhaust hose to the coupler on the portable air conditioner.