6" x 6" - 2-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover Compatible With Duct 10in + Product Details Size – 10in diameter 75 Plenum Box Depth 1267FLR90

+ Product Details Size – 20"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

These grilles and registers give you an extra measure of quality that are visible to your family members and house guests

+ Product Details Size - 20"w X 25"h is the size for the duct opening measurement only

6" x 6" 2 Way Extruded Aluminum Ceiling Diffuser Square HVAC Vent Cover Compatible With Duct 10in + Product Details Size – 10in diameter 75 Plenum Box Depth 1267FLR90 + Product Details Size – 20"w X 32"h is the size for the duct opening measurement only + Product Details Size 28"w X 18"h is the size for the duct opening measurement only