Home Improvement: Perfect for bathroom, kitchen, office, garages, sheds, campers and ideal for indoor ventilation use High-Quality Material: Registers, grilles, and vents are made of high-quality metal aluminum and are therefore particularly robust and will not rust. Grey lacquered surface. Flat construction Easy Installation: Easy indoor/outdoor installation. Available for wall mounting or ceiling mounting. Round connection makes mounting to an air duct using self-tapping screws easy Great for Home Use: The back of the grille is equipped with stainless steel wire net with a hole sizes of 2x2 mm. Protects against birds and mice. Can be used as a dryer vent perfectly, so you won't have to worry about clothing fibers blocking the vents Support Guarantee: We have a 24-month warranty. If you have any questions, feel free to contact us. We will reply within 4 hours