Highcool 4-inch Metal Roof Cowl — Round Exhaust Vent Cover with Snow Hat & Bird Protector

Designed for 4'' diameter ventilation ducts, this Highcool metal roof cowl provides a durable, round exhaust vent cover that promotes efficient air exchange. Constructed from corrosion-resistant galvanized steel, the unit is built for long service life. A rubber seal creates an airtight barrier to prevent drafts and moisture from entering the duct. The cowl features an integrated top or “snow hat” to protect the opening from snow and the elements, and a built-in protector to keep out birds and debris. Not intended for use on heating chimneys. Suitable for HVAC ventilation in residential and industrial applications, offering a versatile solution for roof venting needs.