Aluminum Boat Rectangular Hatch Porthole Window Tempered Glass 10 Sizes Marine Features: Rectangular shape 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 10 overall sizes to choose from 425X525mm?16.7X20.7 Inch) 425X575mm?16.7X22.6 Inch) 425X625mm?16.7X24.6 Inch) 425X675mm?16.7X26.6 Inch) 475X575mm?18.7X22.6 Inch) 475X625mm?18.7X24.6 Inch) 475X675mm?18.7X26.6 Inch) 525X625mm?20.7X24.6 Inch) 525X675mm?20.7X26.6 Inch) 575X675mm?22.6X26.6 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.