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26 Guage - G60 Galvanized steel
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1/8" double sided adhesive gasket on continuous
flange
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Corner flanges are spot welded to body flange for
smooth seal
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Undersized, long collar with crimp and bead
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Prepunched mounting holes at corners
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Duct opening size and transition angles meets SMACNA
requirements
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"Blue Label" - Union made
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Installed damper: Double bearing - all sizes with
handle and wing nut (second bearing on non handle side has locking wing
nut)