3" X 10" FLOOR REGISTER WITH LOUVERED DESIGN - FIXED BLADES RETURN SUPPLY AIR GRILL - WITH DAMPER & LEVER - BLACK sidewall + Product Details Size -

+ Product Details Size - 30"w X 16"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 36" or 36" x 6" duct opening (measured at the opening)

+ Product Details Size - 28"w X 28"h is the size for the duct opening measurement only

back blades made of black plastic for reduced air noise and discreet appearance

The first number in a grille size represents the width

3" X 10" FLOOR REGISTER WITH LOUVERED DESIGN - FIXED BLADES RETURN SUPPLY AIR GRILL - WITH DAMPER & LEVER - BLACK sidewall + Product Details Size -+ Product Details Size 3"h X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 4. 5" X 11. 5" wider. Installation Location Floor. Design Rigid gauge built for durability and long life in mind, but still light and handy. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. Quality Packaging Carefully shrink wrapped with cardboard backing to prevent damage