Comparison : Item # 46DVA-06, 6" Length Galvanized Venting Pipe
Item # 46DVA-09, 9" Length Galvanized Venting Pipe
Item # 46DVA-12, 12" Length Galvanized Venting Pipe
Item # 46DVA-18, 18" Length Galvanized Venting Pipe
Item # 46DVA-24, 24" Length Galvanized Venting Pipe