Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 6" Vent Connection 18in diameter Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

Actual Filter Size – 23 3/4"w x 23 3/4" x 1"

including the ability to mount without removing the thermostat when using the ring base

actual front end outer dimensions are approximately 14 5/8" width X 24 5/8" height

Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 3 Coned - 24" x 24" - For 6" Vent Connection 18in diameter Actual Filter Size – 21+ Product Details Size 24"w X 24"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 6" 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