Steel Square Mount Installation Frames (21 Series)
Steel Square Mount Installation Frames (21 Series)
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More About Steel Square Mount Installation Frames (21 Series)
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The 21 Series Steel Square Mount Installation Frames by Hart & Cooley provide all-steel construction, and come in a golden sand enamel finish. They are used but not furnished with 24 Series Diffusers. They are not required when using 22 Series Butterfly Damper or 23 Series Opposed Blade Damper.
More About Steel Square Mount Installation Frames (21 Series)
The 21 Series Steel Square Mount Installation Frames by Hart & Cooley provide all-steel construction, and come in a golden sand enamel finish. They are used but not furnished with 24 Series Diffusers. They are not required when using 22 Series Butterfly Damper or 23 Series Opposed Blade Damper.