Selkirk 12" to 30" Pipe Increaser (Round Large - Type B Gas Vent) w19.75 25″ x 18

25″ x 18

Seat Height: 14

fuels used

Fire glass: To be used under a 2 - 4 inch layer of fire glass for best effect

Selkirk 12" to 30" Pipe Increaser (Round Large - Type B Gas Vent) w19.75 25″ x 18Selkirk 12" to 30" Pipe Increaser The increaser is used to increase the vent size. The maximum increase is 4 sizes. Round Large Type B Gas Vent Model R Double Wall Type B Gas Vent is designed for quick and easy installation. It's durability makes it ideal for multi family and commercial industrial applications. Featuring an aluminum inner liner designed to assure quick vent action and minimal condensation. Lightweight and easy to assemble with snap