Company record
National Excelsior Company specializes in the production of sheet‑metal components and related accessories. Its catalog spans a broad range of items such as duct fittings, cleats, diverters, pipe supports, angles and angle strips, KC ears, wall jacks, shingles, wall frames, literature racks, collars, AC mounting brackets, plenums, filter racks, dryer‑vent hoods, ceiling‑outlet adapters, range‑hood connectors, dampers, joist‑end caps, rain caps, and duct‑hanger strips.
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