The 0800 Collection is obtainable in two frame designs to be used with steel duct: a double flange screw gap mounting variety (M1) or possibly a knock-more than tab style (M2). Equally types feature a straightforward set up Reduce-out template which makes the oval form openings further straightforward to Reduce. https://heavy-duty-stainless-stee35566.ja-blog.com/37168019/everything-about-heavy-duty-stainless-steel-damper-manufacturers