The Berner 65MK-042NE is a 42-inch nozzle extension designed for air curtains. Constructed from clear anodized aluminum, this durable extension enhances the performance of your air curtain system. It is easy to install in the field, allowing for seamless integration and improved air flow management. Ideal for creating a more effective barrier against drafts, dust, and insects, this nozzle extension is a practical addition to your air curtain setup.