Ducting Collar 4" - Galvanized Steel Pest and Disease Control Hydrofarm searched globally and went

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Ducting Collar 4" - Galvanized Steel Pest and Disease Control Hydrofarm searched globally and wentA steel ducting flange designed for use with applications like tumble dryers, bathroom fans, and range hoods. Crimped rims and raised lip on the duct opening for enhanced grip on ducting. Flat brim that lays flush against all flat surfaces and creates an airtight seal to keep particles out. Galvanized steel body that is corrosion resistant and can withstand high temperatures. Ducting Opening Diameter: 4 inches Collar Diameter: 7 inches Finish: Zinc