30" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling return filter this flex duct decreases the

this flex duct decreases the pressure loss and provides a more hygienic environment

Designed for optimal airflow and lasting durability

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

+ Product Details Size – 4"w X 14"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 9 3/4" x 1"

30" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling return filter this flex duct decreases the+ Product Details Size 30"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 31. 875" width X 6" 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