This eye catching brass porthole window opens just like an actual porthole. The window can be removed and the brass porthole can be used as a picture frame if so desired. It measures 11.5"Dia. overall and 8"Dia. for the window itself. We are a retailor and do not deal with the installation process. The manufacturer does not supply any parts with this item. The only item being sold is the porthole window itself as pictured. It will add a definite nautical touch to whatever room it is placed in and is a must have for those who appreciate high quality nautical decor. It makes a great gift, impressive decoration & will be admired by all those who love the sea.