The square diffuser is designed for use with exhaust fans, bathroom fans, and ventilation fans, it can be used as a vent grille and air diffuser. In additions, it enhances the aesthetic of indoor and outdoor walls or ceilings. Widely used in home, office and factory. Specification Color: White Material: ABS Plastic Height: 20mm / 0.8 inch Overall Size: 340 x 340 mm / 13.8 x 13.8 inch(L*W) Back Panel Size: 270 x 270 mm / 10.6 x 10.6 inch(L*W) Spring Length: 195mm / 7.7 inch Package Content: 2 x Square Air Vent Covers Advantage The plastic square air diffuser is made of ABS plastic, which offers the advantages of oxidation and corrosion resistance. It is lightweight, making it easy to install and dismantle. The surface is smooth, making it easy to clean. It is suitable for most home or office decorate styles. With step-down structure design, the exhaust fan cover provides even and wide air distribution for the room, ensures a better ventilation performance. Instruction Easy to install, the vent cover can be easily fastened to exhaust fan with the equipped springs, strong enough to ensure a secure installation. NOTE: Before purchasing, please check the size of your exhaust fans or ceiling opening to ensure compatibility. Regularly inspect and clean the air vent to maintain optimal performance.