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Collar, Start Round 12" C - Small End
Gray Metal Starting A Collar, 313SE Model, 12 in Duct, Round Vent Duct, 26 ga, Steel, Galvanized
Elbow, 90° 12" Round Adjustable Turned Galvanized 30ga
Elbow, 90° 8" Round Adjustable Turned Galvanized 30ga