Check the listing for details. Boat Yacht Round Opening Portlight Porthole 8" Replacement Window Port Hole -. Condition: New. Listed at 40.00 USD. Enhance the ambiance of your boat or yacht with this stylish porthole window from AmarineMade. The round opening portlight is an excellent replacement window port hole that measures 8 inches in diameter. It is designed to fit most boats and yachts, making it a versatile option for those in need of a replacement window. The porthole window is made by Alfa Marine (Shanghai), a reputable manufacturer known for producing high-quality marine hardware. The package dimensions are 8.66 x 8.54 x 3.78 inches, making it easy to install and replace your old window. The item weight is 1.71 pounds, which is lightweight compared to other replacement windows on the market. Upgrade your boat or yacht with this beautiful porthole window today.