20"W X 30"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 21.75"W X 31.75"H] 14" Diameter This grille has a high 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

This grille has a high standard of design

Actual Filter Size – 7 3/4"w x 33 3/4" x 1"

+ Product Details Size - 22"w X 8"h X 2"d (for duct opening measurement only)

Tamper-Proof Design – Provides robust protection to prevent unauthorized access and ensure consistent thermostat settings

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 26" Or 26" x 34" duct opening (measured at the opening)

20"W X 30"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 21.75"W X 31.75"H] 14" Diameter This grille has a high 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP This grille has a high standard of design Actual Filter Size – 7 3 4"w x 33 3 4" x 1"