Selkirk 105060 Round Type B Gas Vent Chimney Pipe, 5" x 5', #5RV 5 BF10 All Multi Max accessories are Max All Multi Max accessories are Max Performance Tested for endurance in real life applications so that you can feel confident that every WARNING: This product can expose you to chemicals including styrene which are known to the State of California to cause cancer and bisphenol A (BPA) which are known to the State of California to cause birth defects or other reproductive harm The Locktab is then depressed with a thumb or blunt object such as a screwdriver into the lock channel of the male end Round vents for large appliances will be found in the QC section which follows