Dante Products Combo Pack with Angled 1/2-inch, Quarter-Turn Turn Ball Valve, Chrome Floor Plate and 3-inch Key Dante Combo Pack with Angled 1/4-Inch turn Ball Valve, 3-Inch Chrome Floor Plate & Key Material (Key & Floor Plate)-Zinc Die Cast; Chrome Plated Cleanliness-Heats chimney quickly causing fireplace to draw smoke immediately up the chimney, never into the room Convenience-NEW Design Installs in minutes and is easy to use Savings-features an energy conserving air/gas mixing chamber for efficient operation