This is an outdoor pet door suitable for medium-sized dogs. An instruction manual will be sent with the product, but it is not in Japanese as it is a foreign product. Please note that the instruction manual may have some minor stains. Height extension panels are sold separately and are not included. ※ Product Overview Product Dimensions: Frame: 12.2 inches wide x up to 84 inches high | Flap: 8.85 inches wide x 12.25 inches high | Fits most sliding doors. Fiberglass Insect Screen: Durable fiberglass mesh keeps insects out and does not impede airflow in the house. Perfect for hot summers. Easy installation without tools: No tools are required for installation, and it easily slides into the existing sliding door channel. You can attach and detach the pet door without any hassle as needed. Rental Safe: The Patio Pet Door is ideal for those who rent with pets or homeowners who do not want to permanently alter their home. Durable Construction: Powder-coated solid aluminum frame and fiberglass mesh panel. UV-resistant flap. For dogs Pet door Easy to install Outdoor