AllFuelHST Wall Thimble for 6" Diameter Chimney Pipe - 8 Hole Size, High Temperature Resistant Flue Vent Adapter for Wood Stove, Fireplace & Pellet Stove Installation - Perfect for Home, Cabin & RV Use

The Wall Thimble is used for through-the-wall chimney installations.  It protects the wall as the chimney passes safely through to the outside, and provides a finished look to the framed opening on the inside.

The Wall Thimble can adjust to accommodate walls from 6 to 10 inches thick.