This is a 3" x 48" Z-vent straight pipe. It is made of stainless steel and used for category II, III, and IV heating equipment. Z-Vent is approved as a replacement for a high-temperature plastic vent.

Simple Gasketed Connection No Sealant Needed Features the Highest Pressure Rating in the Industry The Only Metallic Special Gas Vent you can Cut to Length On Site New Fusion Welded Pipe Seams for a Smoother Finish and Better Fit Compatible with all types of Z-Flex Z-Vent Made of AL-294C Stainless Steel Warranty Length: Limited 25-year warranty