Material and build: Made from lightweight, wearresistant PVC for a balance of durability and easy handling. The sturdy construction holds up to frequent use and maintains an effective seal over time. What's included: Two adjustable window sealing plates, each measuring 55 cm x 10 cm (21.65 in x 3.94 in), providing a complete set for most singlewindow installations. Primary function: Designed to connect mobile (portable) air conditioner exhaust hoses to window installation panels, creating a tight seal that prevents air leakage and helps the unit run more efficiently. Compatibility: Flexible design fits sliding windows and doors of different materials, adapting to various frame gaps and panel types without requiring custom parts. Performance benefits: Reduces conditionedair loss and helps the air conditioner maintain set temperatures. Limits dust, insects, and external drafts entering through the exhaust opening. Wearresistant PVC resists repeated adjustment and seasonal use. Ease of use: Adjustable length and simple placement let you align the plates with window panels and exhaust hoses quickly; no specialized tools required for basic installation. Use scenarios: Portable AC in an apartment: Connect the exhaust hose to a window panel and use these sealing plates to close gaps in sliding windows to keep hot air out and cool air in. Temporary cooling for a home office or garage: Install the plates with a window exhaust kit to improve air conditioner efficiency during extended use. Shortterm setups in rental properties or seasonal spaces: The lightweight, adjustable plates provide a reusable sealing solution that won't permanently alter window frames. Dimensions and count recap: 2 pieces, each 55 cm x 10 cm (21.65 in x 3.94 in). Material: PVC. Function: Sealing and connecting mobile air conditioner exhaust hoses to window installation panels.