Measurement Method:1. Measure the narrowest part of the width and height of the skylight opening2. Measure the top, middle and bottom of the width, and the left, middle and right sides of the height3. Choose the smallest of the three dimensions: width and heightFeatures:1. The frame is embedded with a sealing rubber gasket to effectively prevent rain from seeping in through the gaps. The support rod can be easily opened and closed silently, with a maximum angle of 80°2. Skylights allow you to control the airflow entering the room. You can open the skylight to exhaust the air in the room and let fresh air into the room, which helps ventilation and temperature controlSpecifications:Name: Skylight Roof Window/Egress Window Well Cover/Lighting Well Window/Material: Aluminum alloy + glassColor: BlackAluminum alloy frame: 1.4 mmTempered glass: thickness 2 cmSkylight opening: 0-80°Product size: length x widthProduct weight: 25 kg/square meter Durable Aluminum Frame & Tempered Glass --- Built with a str-ong aluminum frame and double-layer tempered glass, this skylight roof hatch ensures durability, insulation, and weather resist-ance for year-round comfort. Customizable Skylight Design --- Available in vari-ous sizes, this skylights for house roof option can be tailored to your needs. Perfect fit for different roof skylight for home projects and renovations. Easy Opening with Gas Strut --- The skylight features a smooth gas strut lift, making skylights & roof windows simple to open for fresh airflow, while keeping indoor spaces bri-ght and well-ventilated. Quick DIY Installation --- Simply place into the pre-cut roof opening and secure with adhesive. This skylight roof window offers hassle-free set-up, for windows & skylights upgrades. Brighten & Ventilate Your Home --- Transform dar-k spaces with skylight windows for house roof. Designed for better airflow, skylights for roofs enhance light and air, creating a healthier liv-ing environment. Item Weight 14.33 pounds Manufacturer MXL&LJB Item model number MXL&LJB Batteries required No Package Dimensions 0.39 x 0.39 x 0.39 inches