Metal-Fab Type B-Vent 4" to 7" Increaser w40.7 Make your 60" vent-free linear

Make your 60" vent-free linear see-through fireplace complete with Empire's high-quality stainless steel decorative front made for Boulevard models

non-porous surface and attractive design

4" x 24" Single Wall Flex Connector

Firebrick (Required)

Piezo ignitor

Metal-Fab Type B-Vent 4" to 7" Increaser w40.7 Make your 60" vent-free linearType B Gas Vent products are tested and listed to UL 441 for approved gas appliances and feature our innovative twist lock connection and locking tab, eliminating the need for sheet metal screws. Metal Fab Type B Gas Vent combines hemmed flues and casings that maximize product durability and reliability and minimize installation time. Designed for versatility, Metal Fab Type B Gas Vent products 3" 6" adapt to major competing brands and when installed