18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille Compatible With Duct 12in Actual Filter Size – 24

Actual Filter Size – 24 3/4"w x 23 3/4" x 1"

+ Product Details Size & Compatibility – The size of sheet metal pipe is 4" round x 120" long

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

actual front end outer dimensions are approximately 7

4x 48" Length Duct

18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille Compatible With Duct 12in Actual Filter Size – 2418" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille Actual Dimensions: 17. 75" X 21. 75" A Uniquie Combination of Cotton & Synthetic Fibers Gives You The Most Filtration And The Least Air Resistance Equals Great Air & Easy Airflow For Your System The "W" Shaped Pleats Give You More Filter Surface Thereby Capturing More Dust All Our Filter Are Tested Per ASHRAE 52. 2 Standards MERV 8 And An Average Arrestance Of 90 94% Extra Strong Frame Our