Ceiling Grille - 3 Cone Step Down Diffuser - 12" x 12" - 8" Collar Return allow you to customize airflow

allow you to customize airflow direction with ease

actual front end outer dimensions are approximately 18 5/8" width X 28 5/8" height

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

+ Product Details Size - 34"w X 32"h is the size for the duct opening measurement only

+ Product Details Size – 22"w X 12"h is the size for the duct opening measurement only

Ceiling Grille - 3 Cone Step Down Diffuser - 12" x 12" - 8" Collar Return allow you to customize airflow+ Product Details Size 12"w X 12"h. These are specially sized to fit into all drop ceilings, 24"x 24", also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control. For 8" Round Duct Opening Spiral or Flex Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed Heavy Gauge Steel Heavier gauge than needed, built for durability and long life in mind, but still very thin