SIDEWALL/CEILING REGISTER, OVERALL DEPTH 1 1/8 IN, OVERALL HEIGHT 7 3/4 IN, OVERALL WIDTH 13 3/4 IN, MAXIMUM OPENING HEIGHT 6 IN, MAXIMUM OPENING WIDTH 12 IN, FILTER DEPTH NOT APPLICABLE, FILTER HEIGHT NOT APPLICABLE, FILTER WIDTH NOT APPLICABLE, GRILLE COLOR WHITE, GRILLE MATERIAL STEEL, MATERIAL STEEL, DAMPER MATERIAL STEEL, BAR SPACING 1/2 IN, FACE DESIGN LOUVERED, AIRFLOW DIRECTIONS THREE-WAY, ADJUSTABLE BLADES NO, MOUNTING LOCATION CEILING,