The 0800 Sequence is accessible in two body kinds for use with steel duct: a double flange screw gap mounting variety (M1) or possibly a knock-over tab style (M2). Both of those models feature a straightforward set up Slice-out template which makes the oval shape openings further simple to Reduce. https://mylesxmaoc.ssnblog.com/35929550/the-best-side-of-dampers-for-industrial-sector