18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 14" Round Duct Pipe + Product Details Size -

+ Product Details Size - 30"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 25"w X 6"h is the size for the duct opening measurement only

Commercial Grade Aluminum - Will Never Rust - Designed for Warehouses

Tailored for Your Needs: Specifically suited for 24x24 lay-in diffusers

actual front end outer dimensions are approximately 22 5/8" width X 14 5/8" height

18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 14" Round Duct Pipe + Product Details Size -+ Product Details Size 18"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 8" height. High Quality High quality steel construction, no scuff powder coat durable finish, smooth, shiny, scratch resistant, no sharp edges, 2 recessed screw holes on each side with screws included, screws same color as vent cover, easy installation. Adjustable airflow control Adjustable airflow