DuraLiner 8″ Flat Round Stove Connector This DuraLiner 8 Inch Inside Diameter Flat Stove Connector efficiently helps venting of heating appliances while protecting masonry chimneys from the damaging effects of flue gas. Use to connect stove to round or oval DuraLiner pipe. Oval stove connector is sized to convert round stove outlets to oval DuraLiner pipe. Features: Type: Connector. Use to Connect Stove to DuraLiner Pipe. Converts Oval Stove Outlets to Round DuraLiner Pipe. UL Listed. Specifications: Overall Dimensions: 12.25″ (W) x 12.25″ (D) x 2″ (H). Inner Diameter: 8″.