Colour Family: BLACK Assembled Product Length: 5.75" Assembled Product Height: 7" Assembled Product Width: 7" Diameter: 6" . May be required to adapt some stove flue outlets to double wall stove pipes DIMENSIONS: Top inner wall diameter: 6" Top outer wall diameter: 6-1/2" Bottom inner wall diameter: 5-29/32" Bottom outer wall diameter: 7" Length: 5-3/4"