The 0800 Collection is available in two frame models for use with steel duct: a double flange screw hole mounting variety (M1) or even a knock-around tab kind (M2). Equally designs include a straightforward installation Slice-out template which makes the oval condition openings further simple to Slash. Design 0310V/H Vast https://heavy-duty-stainless-stee45677.qodsblog.com/37115800/a-review-of-heavy-duty-stainless-steel-damper-manufacturers