Installation Hole Size: Approx. 303 x 156mm / 11.9 x 6.1in. Item Type: Yacht Porthole. 1 x Heavy Aluminum Alloy Yacht Porthole. Inward Opening Angle: 0-180 degrees. Uv Resistant Glass: 10 mm thick smoke gray acrylic glass, sturdy, can filter out UV while ensuring that light can enter the cabin, improve the brightness of the cabin.
eBay