Automatic Rebound Swing Gate Wide Stainless Steel One-way Door for Store Access，Are you still worried about leaky roofs, or the high cost of maintenance and potential safety hazards associated with old hatch coversOur roof hatches are designed to handle all types of weather with ease, reduce maintenance time, provide more enjoyment, and protect your facility in every way! Specification: Material: Aluminium Alloy, Galvanized Steel Color: White Dimensions: L x W(Inner Frame) Whether Can Be Customised: Yes Measurements: Based on internal dimensions Measuring Tip: Frame Inner Diameter Size ≥ Wellhead Opening Size Cover outer frame size = Cover inner frame size + 12cm (4 5/7inch) Mounting: Expansion screw fixing Features: Load 100 kg/220 lbs. Weatherproof, Insulation. Seamless joints, smooth edges. Spend less time maintaining and more time enjoying. Perfect for attics, warehouses, factories, schools, Stadiums and more, It can also be used as an escape hatch cover, basement exit cover, emergency access cover, manhole cover, cellar hatch cover, and inspection chamber cover. Package Contents: 1 x Roof Hatch Cover Expansion Screws Please Note: If you want to improve the sealing, you can fill the gap with glue (not included in the package). Because of manual measurement, there may be a slight error of a few millimetres, hope you can understand. Because of the display and lighting reasons, the picture and the product may have some differences, please prevail in kind.