![Wall Thimble for 6" Inner Diameter Chimney Pipe](http://allfuelhst.com/cdn/shop/products/AF-HST6-WT-1_{width}x.jpg?v=1610987341)
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.