This Master Flow 7 in. to 9 in. Adjustable Versa Cap is a professional-grade ventilation solution designed for rooftop flues, hot stacks, and B-vent installations. Constructed from durable, rust-resistant aluminum, it features a non-clogging positive draft design that helps ensure efficient airflow. The versatile screwdriver-adjustable clamp allows for a secure fit on pipes with outside diameters ranging from 7 to 9 inches. This UL-listed cap provides weather-resistant protection and a clean, finished appearance for residential or commercial roofing projects

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