The heavy duty brass porthole window is an exact replica of a ship's porthole. It is the perfect alternative for people who want an authentic porthole without paying the huge price. Contractors buy these portholes from us all the time & they install them in homes & businesses. We are a retailor & do not deal with the installation process. The manufacturer does not supply any parts with this item. It does however come with a rubber gasket around the window to make sure the window is properly sealed. The only item being sold is the porthole window itself as pictured. We recommend professional installation of this item. It is available in the 11.5"Dia. size and the size of the window itself is 8.25"Dia. It weighs approx. 14lbs. The glass is 1/2" thick. The heavy duty brass porthole window is an exact replica of a ship's porthole. It is the perfect alternative for people who want an authentic porthole without paying the huge price. Contractors buy these portholes from us all the time & they install them in homes & businesses. We are a retailor & do not deal with the installation process. The manufacturer does not supply any parts with this item. It does however come with a rubber gasket around the window to make sure the window is properly sealed. The only item being sold is the porthole window itself as pictured. We recommend professional installation of this item. It is available in the 11.5"Dia. size and the window itsellf measures 8.25"Dia. It weighs approx. 14lbs. The glass is 1/2" thick.