Features: 1.Strong ABS frame makes it anti-aging, anti-corrosive and ultraviolet resistant. 2.4mm(0.15inch) thickness tempered glass has high strength, clarity, and chemical resistance. 3.Corrosion free synthetic fittings and durable water-tight rubber seals. 4.Easy "click-in" construction,the two fittings can be loosened to allow you to swing open the porthole. 5.Easy to install, pre-drilled countersunk fastening holes (screws not included). Specification: Features:_x000D_ 1. Strong ABS frame makes it anti-aging, anti-corrosive and ultraviolet resistant._x000D_ 2. 4mm(0.15inch) thickness tempered glass has high strength, clarity, and chemical resistance._x000D_ 3. Corrosion free synthetic fittings and durable water-tight rubber seals._x000D_ 4. Easy "click-in" construction,the two fittings can be loosened to allow you to swing open the porthole._x000D_ 5. Easy to install, pre-drilled countersunk fastening holes (screws not included)._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: Porthole_x000D_ Color: Black _x000D_ Frame Material: ABS_x000D_ Glass Material: Tempered Glass_x000D_ Glass Thickness: 4mm / 0.15in_x000D_ Shape: Rectangle_x000D_ _x000D_ Package List:_x000D_ 1 x Boat Porthole PackageList: