This thimble kit from FMI is easy to install, and it is capable of being installed and compatible with other FMI products. This thimble is designed to help improve the ventillation system, and it is designed to fit with 5 by 8 vent systems. This thimble can help complete your vent system and complete the installation of your heating appliance. This simple piece is an affordable way to ensure that you will be able to keep your fireplace and vents working properly.
- Firestop thimble kit
- Designed for FMI gas appliances that require 5" x 8" venting systems