The 0800 Collection is offered in two body variations for use with steel duct: a double flange screw hole mounting style (M1) or maybe a knock-over tab form (M2). Both equally types come with a straightforward set up Slash-out template which makes the oval shape openings extra easy to Slash. https://troywpesh.bligblogging.com/37609281/facts-about-dampers-for-industrial-sector-revealed