I used this when renting a car for overseas travel. I heard that if you rent a car in America and have an accident, insurance won't cover it if your child isn't using this. I've heard that the overseas version is different from the domestic version. I don't know the details, so please purchase only if you understand. Price is for a set of 2. No individual sales. Includes instructions. 【Regarding Price Negotiation】 Price negotiation is possible, but please refrain from negotiating and then not buying. I cannot respond to requests to lower the price if you use the "register desired price" function and then don't respond. Please offer your desired price via "comments." 【Regarding Dedicated Listings】 I generally do not accept dedicated listings. This is because in the past, there have been many people who didn't purchase after I made a listing dedicated to them. It's first-come, first-served. 【Regarding Items】 Please check the manufacturer's website for detailed sizes and usage instructions. If it's not on the manufacturer's website, please search online. Also, if I include the size in the description, please understand that there may be errors due to my amateur measurements. I am also not interested in fakes or copies. Everything is genuine. Colors may appear different in the photos, so please inquire before purchasing if you are concerned. 【Regarding Condition】 I will inform you as much as possible. Please judge based on the photos and description. Even if it's new or used, please assume there may be scratches. There may be scratches I didn't notice. I am a non-smoker and have no pets. I am a clean person and try to use and store things as cleanly as possible. 【Regarding Shipping】 I will pack as carefully as possible, but I am not a professional. Packing may take priority, and the size may become slightly larger or smaller. 【Regarding Messages】 I have decided not to write greetings after purchase, message notifications after shipping, or evaluation messages. I will make the transactions easy and casual for both of us. I will only contact you if there is a problem. Please purchase only if you agree to all of the above. Especially those who are concerned about the condition, please refrain from purchasing. If there is a problem with the item, please contact me before leaving an evaluation. I will respond appropriately. Thank you.