Our own team of in-house engineers and designers have learned a lot from collaborating with industry experts. Those lessons are applied to our mold designs to include product features that ensure leak free installations. Such as extra large flanges and built-in drip-edges that lead water away from the vent and seamless molds that allow zero tolerance for leaks.

Best of all, plastic never rusts. Ever. And, because Primex uses only high grade resin with the maximum amount of UV protection, our vents stay looking great for years and years. Plastic is also impact resistant, even at low temperatures. Primex vents won’t dent or crack when hit with a baseball or hockey puck. They maintain their “like new” look even after a hail storm that would dent a metal vent.

- See more at: http://www.primexfits.com/hvacventing/products/#sthash.wTs3UbJG.dpuf