Metal-Fab Type B-Vent MSWFA 4" x 48" Single Wall Flex Connector d7.5 With its stylish matte black

With its stylish matte black design and exceptional wind resistance of up to 8mph

) x 6" (L) Listings UL-641

Infused with silica

Usable Indoors and outdoors

Shipping Dimensions: 21

Metal-Fab Type B-Vent MSWFA 4" x 48" Single Wall Flex Connector d7.5 With its stylish matte blackType 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