Features: The universal dryer Vents cage guard fit most 3 in. to 4inch. hood style Vents cover, fit most kitchen or bathroom exhaust Vents/clothes dryer Vents/bathroom fan Vents. Using the dryer exhaust guard to keep small animal and birds out of the dryer Vents/exhaust Vents while allowing airflows, no more small animals in the dryer Vents. Our outdoor bird guard for dryer Vents cover is make of Carbon Steel, not easy to fade and crack, strong than plastic dryer Vents bird guard, not easily chewed by animals. Easy to install: The dryer Vents cover guard is easy to install, package includes screws, just cover the entire dryer Vents cover and tighten it with screws, and have plenty of room for the Vents flapping to open. Warm tip: Please measure the size of the dryer Vents cover before order. Please clean the lint or debris on the dryer regularly. Specifications: Material: Carbon Steel Size: about 17.8x17.8x12.7cm/7.01x7.01x5inch Package Includes: 2Pcs Dryer Vents Bird Guard note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.