The 0800 Series is obtainable in two body models to be used with steel duct: a double flange screw gap mounting type (M1) or perhaps a knock-around tab type (M2). Equally styles have an easy installation Lower-out template which makes the oval form openings excess simple to Slash. Model 0540V https://fire-resisting-ductwork-i03456.blog4youth.com/37492566/a-review-of-heavy-duty-stainless-steel-damper-manufacturers