This Broan NuTone roof cap is designed to fit a 3-1/4″ x 10″ duct and comes in a sleek black steel finish. It features a built-in damper to prevent unwanted drafts and ensure efficient ventilation. The brand is known for its high-quality products and this roof cap is no exception. Perfect for those in need of a new or replacement roof cap, this product is sure to meet your needs.