Dura-Vent 3PVP-36 36 Straight Length Pipe - Galvalume Listed To UL 441. Marketed Exclusively To The Specialty Hearth Market. Laser-Welded (Not Spot Or Pop Welded) 304 Stainless Steel. Many Parts Are Available In Heat Resistant Matte Black Finish. Perfect Fit Construction Allows Ease Of Twist-Lock Connections While Eliminating Leaks - No Gaskets Or