Thank you for looking! This is a set of a baby gate and extension frames. It can be installed for openings between 216cm and 222cm! I'm selling it because I stopped using it after about two weeks. - haihai Baby Gate L size - Dedicated extension frame 77cm - Dedicated extension frame 56cm - Dedicated extension frame 7cm There is a video on the Rakuten haihai baby gate product page that shows how to install it. I was able to install it easily by myself (a woman). It is possible to sell the items separately, but please consider that the shipping costs will be separate, making it more expensive. Please refrain from purchasing if you are sensitive to used items, as these items have been stored by a private individual. Immediate purchase is OK. I have listed the items at almost the lowest price, so I don't think I can lower the price much. Thank you very much! Baby gate, top of stairs, tension, stairs, kitchen, bottom of stairs, baby gate, wide, baby guard, baby fence, pet fence, pet gate, dog fence, steel gate, safety, wall saver, slope, crawling