This is a BRAND NEW Universal Furnace Squirrel Cage / Blower Wheel. It's 7.5 " in diameter and 9 " tall with a 1/2" bore. If the set screw is facing up (as in the picture) it rotates Clockwise. The center wall of the wheel is Flat with no indentation either way. This wheel is used in all brands of furnaces and is rated for up to 1600 RPM. Thanks for looking and good luck!
A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways