Abstract: An air register of molded plastic material comprising a basic framework with slotted air openings, a pair of vanes journaled in the frame with means for opening and closing the vanes for the passage of a selected volume of air through the register; a pair of spur gears, one gear cast at an end of one vane and another integrally cast at an end of the other of said vanes, the gears being properly enmeshed for operation upon mounting the same to said framework and means for operating the gear train for movement of said vanes.