Commercial Waterproof Skylight Window Roof Hatch, Skylight Ventilation Access Hatch High Strength and Durability for Manholes, Roofs, Attics, Basements(55x55cm/21.65x21.65in)

Brand：HSOQNThe aluminum alloy roof cover is specially designed for safe and convenient passages. It uses hydraulic power-assisted opening and internal locking design to save worry and effort every time you enter and exit. It provides reliable load-bearing and wind and rain protection to ensure your indoor safetyProduct name: Aluminum alloy roof access coverMaterial: aluminum alloyColor: dark grayAluminum alloy thickness: 1.2mm/0.047inFunction: protection/security/anti-theft/energy savingFeatures: Strong, high strength, weather-resistant, anti-fadingInnovation: Hydraulic support rod/internal locking/cover wider than chassis (waterproof)Size: Provide common inner diameter sizes and support customizationPackage contents: 1×roof access cover, 4×boltsMeasurement tips: The inner diameter of the chassis ≥ the wellhead opening sizeBottom frame and cover frame: cover outer frame size = bottom frame inner diameter size + 11cm / 4.33inchThings to note:1. For smooth installation, please measure the opening size in advance and leave 1-2 cm of space around the product2. During operation, please hold the handle tightly and open and close at a constant speed to avoid suddenly letting go, causing damage to the hydraulic rod and affecting the use experience

• Support customization: Support customization of size according to needs, providing a variety of conventional base inner diameters for you to choose from. Just provide the specific opening size, and we can accurately match the production for you to ensure a good fit and installation
• Stable load-bearing: Made of 1.2mm thickened steel plate, with an 8cm wide reinforcement in the center of the cover. Static load-bearing capacity of up to 30kg, solid and stable structure, no fear of long-term outdoor use
• Sealing strip and handle design: built-in sealing rubber strip to prevent rainwater from penetrating into gaps. The built-in handle can be easily opened and closed, and only the inside can be locked to ensure the safety of the indoor environment
• Easy to install: Each boathouse security door comes with pre-drilled mounting holes and expansion screws for direct installation. You can also use sealant to further fill in the gaps to further enhance the waterproofing properties
• Widely Used: Access hatches not only provide convenient roof access in a variety of environments such as factories, warehouses, workshops and businesses. Can also be used as attic skylight cover, basement exit cover, emergency exit cover, manhole, basement cover, manhole cover