12" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return Grille Actual Filter Size – 33

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

actual front end outer dimensions are approximately 12 5/8" width X 10 5/8" height

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

this thermostat guard is an ideal solution for residential

12" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Return Grille Actual Filter Size – 33+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 875" width X 10" 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