LG - Louvre Grille (Round)
SD - Single Deflection Grilles (Fixed)
SD - Single Deflection Grilles (Removable Double Margin)
SD - Single Deflection Grilles (Round)
DD - Double Deflection Grilles (Fixed)
DD - Double Deflection Grilles (Removable Double Margin)
DD - Double Deflection Grilles (Round)
TAG - Transfer Air Grille
VCD - Volume Control Damper (Quadrant Arm)
MVCD - Motorized Volume Control Damper
