(Box of 4)  Broan-NuTone WC650 4" Wall Cap is a white wall cap designed to cover a 4" round duct. This product from the trusted brand Broan-NuTone provides a clean and seamless finish for your ventilation system. Its model, WC650, is specifically designed to fit a 4" round duct diameter, ensuring a secure and efficient connection for your home or commercial space. This wall cap is a practical and aesthetically pleasing solution for your ventilation needs.