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actual front end outer dimensions are approximately 27 5/8" width X 36 5/8" height
actual front end outer dimensions are approximately 31 5/8" width X 24 5/8" height -
+ Product Details Size – 50"w X 20"h is the size for the duct opening measurement only
+ Product Details Size - 4"w X 26"h is the size for the duct opening measurement only
+ Product Details Size - 6"w X 34"h is the size for the duct opening measurement only
24" x 6" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 26w X 8"h] Round Damper Ring actual front end outer dimensions24"w X 6"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 26" Width X 8" Height SEE IN DESCRIPTION HOW TO MEASURE A GRILLE Installs Directly On Round & Oval Spiral Duct No Frames, Box or Other Attachments Needed Commercial Grade Aluminum Will Never Rust Designed for Warehouses, Factories, Workshops, Gymnasiums & Restaurants Easy Unrestricted Air Flow For Your HVAC System 180 Degrees Double Direction Adjustable