18"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 25.875"H] Blade Actual Filter Size – 24 12SFLX-R6 w4h4 Monitor the pump for

Actual Filter Size – 24 3/4"w x 13 3/4" x 1"

actual front end outer dimensions are approximately 38 5/8" width X 22 5/8" height -

+ Product Details Size - 32"w X 24"h X 2"d (for duct opening measurement only)

Filter Size - 13

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening)

18"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE EASY AIR FLOW LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 25.875"H] Blade Actual Filter Size – 24 12SFLX R6 w4h4 Monitor the pump for Actual Filter Size – 24 3 4"w x 13 3 4" x 1" actual front end outer dimensions are approximately 38 5 8" width X 22 5 8" height