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- Sheet Metal Duct Collar Product #: 45-2010Model 45, 20" x 10", Hot Dip Galvanized Steel, Straight, Starting, Sheet Metal Duct Collar Learn More
- Sheet Metal Duct Starting Collar Product #: 45-20Model 45, 20" x 8", Hot Dip Galvanized Steel, Straight, Rectangular, Sheet Metal Duct Starting Collar Learn More