High-quality materials The ventilation grille is made of high-quality plastic, resistant to corrosion, rust and oxidation, not easy to deform and durable. The surface is smooth and the edge curvature is natural. Round vent The round vent hole has a diameter of 75mm, which has good air and moisture permeability. air while preventing insects such as cockroaches from entering. Easy to install Just install it step by step according to the installation diagram. First, cover the air outlet cover, then tighten it along the thread direction. No other tools are required and the installation is very easy. Adjustable air volume design After the vent is installed, the space can be expanded and reduced by rotating the washer , and the regulating valve can control the amount of air to achieve the ideal ideal amount of air. Wide range of applications This product is widely used in cabinets, cabinets, shoe cabinets, doors, lockers, etc. in bedrooms, kitchens, living rooms, etc. It is suitable for offices, conference rooms, auditoriums, concert halls and other stages. Sold by grid cool store