10" x 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w26h26 + Product Details Size –

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

5mm of thickness to ensure a proper seal while being light and

This 8" X 8" end cap is constructed with 26-gauge galvanized steel

+ Product Details Size - 12"w X 12"h Is The Size For The Duct Opening Only

10" x 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w26h26 + Product Details Size –+ Product Details Size 10"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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