This Imperial Straight Register Boot is used to create an in-line transition from 6-in round pipe or insulated flexible duct to a 4-in x 10-in register or grille. Made from 30-gauge galvanized steel for rust resistance and long-lasting durability, this straight register boot is easy to install with sheet metal screws (sold separately) for a secure fit. Its universal design is suitable for use in most heating, venting and air conditioning applications.
- Creates a straight, in-line transition from a round pipe to a floor register or grille 
- Connects to 6-in round pipe or insulated flexible duct 
- Constructed from 30-gauge galvanized steel for durability and rust resistance 
- Easy to install with sheet metal screws (not included) 
- Suitable for use in most HVAC applications 
- Fits 4 inch x 10 inch register or grille