32" x 8" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 34w X 10"h] Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 14 5/8" height

875" width X 10" height

+ Product Details Size – 30"w X 14"h is the size for the duct opening measurement only

+ Product Details Size - 10"w X 28"h is the size for the duct opening measurement only

32" x 8" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 34w X 10"h] Fixed Blades with Damper + Product Details Size –32"w X 8"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 34" Width X 10" 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