18" X 30" Or 30" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 31.75] Compatible With Duct 12in + Product Details Size -

+ Product Details Size - 48"w X 24"h is the size for the duct opening measurement only

24"w X 6"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size – 18"w X 6"h is the size for the duct opening measurement only

this coil exceeds the required 700 PSI for R410 with a pressure rating of 2300 to 6500 PSI

+ Product Details Universal Fit - Accommodates almost any thermostat with dimensions of 8-1/4" H x 5-3/8" W x 3-1/2" D

18" X 30" Or 30" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 31.75] Compatible With Duct 12in + Product Details Size -+ Product Details Size 18"w X 30"h or 30" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" width X 31. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully