14" X 10" 3-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 18" Round Duct Pipe Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 27 3/4" x 1"

+ Product Details Size - 18"w X 4"h is the size for the duct opening measurement only

Easy Installation – Just pop the diffuser right into the wall duct hole and the side springs will hold it right into place so that it looks clean

+ Product Details Size - 8"w X 8"h X 2"d (for duct opening measurement only)

this guard is designed to provide maximum protection against tampering while maintaining a clean and professional appearance

14" X 10" 3-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 18" Round Duct Pipe Actual Filter Size – 21+ Product Details Outer dimensions: 15. 75"W x 11. 75"H fits a 14" X 10" duct opening Durable stamped steel construction ensures long lasting performance Designed for sidewall and ceiling installation with included screws Multi shutter damper with easy lever for precise airflow control Smooth powder coated white finish for a sleek look and scratch resistance + Product Description Maximize your homes airflow with this premium Air Supply Grille air