I purchased this from Yahoo Shopping to prevent my cat from accidentally getting locked in a room, but I ended up buying something else and haven't had a chance to use it, so I'm selling it. The bag has been opened! It cost 990 yen. **Features of the Automatic Door Stopper:** It's a common scene: interior doors slamming shut due to wind or children. In homes with small children or pets, this can lead to injuries or accidents, such as fingers getting caught in the door or being locked inside a room. This automatic door stopper requires no tools and can be installed even in rental properties. It's easy to operate and provides safety measures. * Prevents children and pets from getting their fingers caught or injured. * Prevents children and pets from being locked inside a room. * Allows for ventilation of the room. **※ Important Notes:** * Please install on a flat surface. * The adhesive is strong, making it difficult to remove once applied. * Please confirm the installation method before setting up. * Do not use for purposes other than intended. **Name:** Automatic Door Stopper **Size:** Approximately 8.6 x 5.3 x 2.5-3.5 cm **Materials:** ABS, TPR, 3M adhesive **Contents:** 1 piece **Country of Manufacture:** China