This is an entrance/exit for cats that attaches to a window (small dogs are also okay). It was installed for 4 years. The lock on the right side of the entrance/exit door is broken (please check the image). The frame itself is sturdy as it was only removed after 4 years of installation, but the plywood at the bottom of the frame is peeling, there are remnants of removed tape, and the sponge tape for preventing drafts has deteriorated. However, I believe it can be repaired with items from a 100-yen shop. I purchased it for over 30,000 yen. I would be grateful if someone could use it. (^^) Size: Height: 131 cm Width: 26.3 cm Thickness: 2.4 cm Entrance/exit size: 14 cm x 16 cm