FMI/Superior Wood Fireplace Firestop Spacer for 12 Inch Chimney Pipe. Only FMI/Superior Chimney Wood Fireplace Chimney Liners and Chimney Liner Accessories are approved for use with FMI/Superior Wood Fireplaces. They are UL approved and are not for use with any product other than FMI/Superior Wood Burning Fireplaces.
- Firestop Spacer for 12 Inch Chimney
- Required at ceiling
- 19.5" x 19.5" overall