The mechanism to open and close the louvers is going to need to be greased up to get going smoothly. Cannot be combined as this thing weighs ALOT! The item "LARGE 26 X 26 Vintage Antique Cast Iron Floor Grate Vent Register Grate Louvered" is in sale since Sunday, May 31, 2020. This item is in the category "Antiques\Architectural & Garden\Hardware\Heating Grates & Vents". The seller is "garage-sailing-treasures" and is located in Petersburg, New York.This item can be shipped to United States.