DuraVent DirectVent 6-5/8 in. D Aluminum/Galvanized Steel Flue Thimble

The DirectVent Pro 4" Inner Diameter Galvanized Wall Thimble is a component that is used in a typical venting installation. The DirectVent Pro wall thimble provides a complete wall-pass-through and fire stop. Use with Square Horizontal Cap only. May be required in Canada. Refer to the appliance manufacturers installation instructions for requirements.