Brand Name: Imperial
*Adjustable: Yes
*Diameter: 4 in.
*Material: Galvanized Steel
*Product Type: Duct Adapter
*Twist Lock: No
*End 1 Outside Diameter: 4 in.
*End 1 Inside Diameter: 4 in.
*End 2 Outside Diameter: 4 in.
*Packaging Type: Bulk
*Color: Silver
*End 2 Inside Diameter: 4 in.
*UL Listed: Yes