Ceiling Grille - 3 Cone Step Down Diffuser - 12" x 12" - 8" Collar w18h18 with an additional 1 7/8"

with an additional 1 7/8" width and 2" height

Design - special "V" shaped louvers ensure 100% view block while ensuring easy un-restricted air flow

actual front end outer dimensions are approximately 22 5/8" width X 34 5/8" height -

The crank handle lever makes it easy to adjust to every weather situation

High Quality – Solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

Ceiling Grille - 3 Cone Step Down Diffuser - 12" x 12" - 8" Collar w18h18 with an additional 1 7/8"+ 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