PRECISE MEASUREMENTS: Louver dimensions: 4.72" x 4.72" inches. Overall grate dimensions: 6.50" x 6.50". Screw hole size - 5.67" x 5.67". Ideal for room exhaust and intake ventilation use. The installed nylon mesh protects the ventilation ducts against dust and debris. Square ventilation grille, made of high quality galvanised steel and coated with a durable epoxy finish. NO SREWS INCLUDED. Great and beautiful design. Easy Installation - available for wall mounting or ceiling mounting. Crawl space vent cover for rv furnace vent screen, cold air return, intake, exhaust air circulation, garage, basement and more. Vent Systems products are made to be used for home improvement, office improvement. They are portable, crafted with great workmanship, and built to last. Vent systems works with manufacturers, markets and distributes products and system solutions for simplified construction and improved indoor climate. // The products are characterised by their quality, ease of assembly and consideration towards the environment. // We simplify construction // At Vent Systems, we simplify construction because it is in human nature to build. By simplifying in every stage, we make it easier to install seamlessly. We develop products with people in mind. We offer solutions that meet the demands for comfort, simplicity and aesthetics. // We are driven by a strong passion and desire to continuously offer improvements. // Partly for all the customers and partners who use our products and solutions, but also for the people who live and work in buildings that uses our products. We simplify construction and help to create a healthy indoor climate. // Ideal for all tumble dryer vent pipes / hoses, bathroom extractors & vents, air conditioning and heating units, kitchen vents & fans, all home wall and ceiling vents, heat transfer and ventilation systems, gas & electric dryers, cooker hood extractors, as well as a wide variety of industrial uses.