<p>KB Duct provides duct with and without flanges (angle rings) in black iron, galvanized or stainless steel and with or without holes. With three production locations across the country, KB Duct can manufacture flanged duct from 3” all the way up to the size you could drive a truck through. They can manufacture lighter gauges to full-welded product in heavy gauge (even up to 1/4") - all depending upon the application. </p>
<p>Vanstone and Welded are two available options with regard to how the flanges can be utilized.</p>
<p>Available in heavier gauges and larger sizes.</p>
