Aluminum Boat Square Hatch Porthole Window Tempered Glass 8 Sizes Marine Yacht Features: Anodized heavy-duty aluminum frames No sharp corners to snag lines or sails Spare parts available 6mm tempered smoke glass Quick acting, adjustable tie down dogs Heavy-duty 316L stainless steel support 8 overall sizes to choose from: 325x325mm,12.8x12.8 Inch 375x375mm,14.8x14.8 Inch 425x425mm,16.7x16.7 Inch 475x475mm,18.7x 18.7 Inch 525x525mm,20.7x 20.7 Inch 575x575mm,22.6x22.6 Inch 625x625mm,24.6x 24.6 Inch 675x675mm,26.6x26.6 Inch Corner Radius: R45mm,R1.8 inch Frame: Anodized Aluminum Glass: tempered glass, smoke color,6mm thick The listing price does not include any destination duties/taxes/custom fees/etc that will be due when the product arrives at destination countries/regions. It is the customer's responsibility to pay for all custom duty/taxes/custom fees if any.