Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 8" Vent Connection - Black return grille For 12" Round Duct Opening

For 12" Round Duct Opening - Spiral or Flex

+ Product Details Size – 8"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 26 5/8" height

+ Product Details Size - 6"w X 30"h is the size for the duct opening measurement only

Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 8" Vent Connection - Black return grille For 12" Round Duct OpeningEasy Unrestricted Air Flow For Your HVAC System See our separate listing for Butterfly Dmaper to Control Airflow Optional Butterfly Damper Available At Asin: B007CNEL1W For 8" Round Duct Opening Spiral or Flex Q: Why BLACK? A: Black Grilles Always Look Sharp And Never Show DIrt & Dust Marks Drop Ceiling HVAC Supply Grille For T Bar Lay In 3 Coned 24" x 24" For 8" Vent Connection Black These are specially sized to fit into all drop ceilings, 24"x 24",