Wall exhaust vent cap designed for microwave range hoods and kitchen vents, measuring 10.25 inches wide by 3.4 inches tall. This vent kit fits standard 3.25 by 10 inch rectangular ducts and extends 4.875 inches for secure duct connection. Made from 28-gauge rustproof galvanized steel suitable for long-term outdoor use. Features a spring-loaded damper with silicone seal to prevent backdrafts and pests, plus a removable bird screen for easy cleaning without disassembling.