4" RV 90+ Type B Gas Adjustable Elbow. Used when an offset is required to avoid obstructions such as rafters, joists and other construction obstacles. Selkirk is the most trusted name in insulted venting products. Used by professionals and homeowners alike for over 60 years. Selkirk continues to produce and develop innovative and safe products.
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Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause c