36" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 14 5/8"] w30h30 Pressure Rating: 2100 to 7000 Drop Ceilings / Aluminum The set includes a FG1836 HP-1

Pressure Rating: 2100 to 7000 PSI

4" X 12" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

actual front end outer dimensions are approximately 10 5/8" width X 10 5/8" height

+ Product Details Size - 14"w X 28"h is the size for the duct opening measurement only

Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions

36" X 12" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 38 5 8" X 14 5 8"] w30h30 Pressure Rating: 2100 to 7000 Drop Ceilings Aluminum The set includes a FG1836 HP 1 Pressure Rating: 2100 to 7000 PSI 4" X 12" Brass Victorian Floor Register Grille Modern Contempo Decorative Grate HVAC Vent Duct Cover Brass Plated