10" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 18" Round Duct Pipe These are airflow control components

These are airflow control components made to connect to supply grilles of the drop ceiling

+ Product Details Size - 10"w X 24"h is the size for the duct opening measurement only

Installation Location – Sidewall or ceiling

actual front end outer dimensions are approximately 36 5/8" width X 30 5/8" height

Looks like it was just waxed

10" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 18" Round Duct Pipe These are airflow control components+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 875" width X 12" height. High Quality High quality steel construction, no scuff powder coat durable finish, smooth, shiny, scratch resistant, no sharp edges, 2 recessed screw holes on each side with screws included, screws same color as vent cover, easy installation. Adjustable airflow control Adjustable airflow