DVL/DuraBlack 6″ Chimney Adapter with trim Use to connect from double-wall DVL to DuraTech, DuraPlus, DuraPlus HTC, and DuraLiner for a through-the-wall or ceiling support installation. Required for proper connection. Provides a strong mechanical connection. Painted black. Features: Type: Chimney Adapter. Material: Stainless Steel. Comes Standard with Trim. UL Listed. Specifications: Overall Dimensions: 9″ (W) x 3.75″ (H). Inner Diameter: 6″.