Imperial 7 In. to 8 In. 24 Gauge Black Increaser is specifically designed for use with solid fuel appliances such as wood stoves. Crafted from durable 24-gauge black steel, this increaser is compatible with single-wall pipe systems and allows for a seamless transition from a 7-inch diameter pipe to a larger 8-inch diameter pipe. The large end features a crimped design, ensuring a secure and tight connection between pipes. Using this increaser helps improve airflow and enhances the efficient venting of exhaust gases produced by your wood stove, making it an essential component for optimal stove installation. Model Number: BM0063