Durability even under extreme heat, the DuraVent W2-AVL16 adjustable vent length is fit to your special gas vent system. It belongs to the FasNSeal collection that are engineered with patented mechanical locking bands for easy-installation and safety. This adjustable vent lengths allows for built-in horizontal adjustability without the necessity of cutting down the pipe and adding variable lengths to your straight length pipe. It is also made of AL29-4C stainless steel that is ideal to resisting the effects of the corrosive condensates. This measures 16-inches in diameter and 18-inches in length.This DuraVent W2-AVL16 is UL listed and is backed by DuraVents limited lifetime warranty.DuraVent is setting the standard towards great quality and innovative products. Discover more of these products here at PlumbersStock.com.