<p>Designed to withstand extended exposure to the toughest elements without deterioration. </p> <ul><li>.063 Gauge Aluminum</li><br /><li>Cap Has Been Engineered To Eliminate Any Possibility Of Backwash</li><br /><li>Cannot Become Detached From The Main Stack, Protecting From The Possibility Of Exposing The Breather Holes</li></ul>