on all orders to the lower 48 states
Flat bottom plate measures 18" x 18" with a square collar to accept the square chimney liner at the bottom to terminate the liner at the top of an existing fireplace. The 18"x18" flat bottom plate can be trimmed down with a pair of good tin snips. With this square quick connect bottom plate all you will need to do is insert the liner inside the bottom plate and tighten down the screw on the outside of the collar and your liner is clamped in place at the bottom terminating the old flue of your chimney. We will match the square bottom plate to the square liner selected in step 1.