Concentric Vent Kits Hercules offers premium Concentric Vent Kits that provide efficiency and less structural hastle. SKU 51W18 Product Details | Specifications | Check Inventory Please select CRAWL SPACE/VENT KIT 2" & 3" 3" CONCENTRIC VENT KIT 1/BOX 2" CONCENTRIC VENT KIT 1/BOX HORIZONTAL TERMINATION KIT 2" HORIZONTAL TERMINATION KIT 3" Log in to view price
