24" x 24" Drop Ceiling HVAC Return Grille - For T-Bar Lay-In - PERFORATED - INSULATED 8" Round Duct Pipe + Product Details Size -

+ Product Details Size - 20"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 13 3/4" x 1"

Actual Filter Size – 23 3/4"w x 25 3/4" x 1"

+ Product Details Size – 10" X 2" is the size for the duct opening (floor/vent hole) measurement only

24" x 24" Drop Ceiling HVAC Return Grille - For T-Bar Lay-In - PERFORATED - INSULATED 8" Round Duct Pipe + Product Details Size -Powder Coat Finish Smooth, Shiny, Scratch Resistant, Beautiful. Looks Like It Was Just Waxed Quality Packaging Carefully Shrink Wrapped with Cardboard Backing to Prevent Damage in Shipment Smooth Surface Edges Run Your Fingers Across The Surface To Feel The Smoothness Easy Unrestricted Air Flow For Your HVAC System Pack of 4 Pieces Perforated steel grille for return air flow, sized to fit into all drop ceiling system, also referred to as T Bar or Lay