DuraBlack 8″ SS Single-Wall Pipe – 24″ The DuraBlack 8″ x 24″ Single Wall Stainless Steel Stove Pipe Straight Length from the DuraBlack Series is a component that is used in a typical venting installation. Use for a single-wall connector pipe. Requires 18″ clearance to combustibles. Features: Type: Pipe. Finish: Stainless Steel. Pipe Type: Single Wall Connector. Used in a Typical Venting Installation. Requires 18″ Clearance to Combustibles. Specifications: Overall Dimensions: 24″ (L) .