18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille RG66 Black-HP + Product Details Size –

+ Product Details Size – 20" x 24" or 24" x 20" is the size for the duct opening measurement only

High Quality – Polished pre-finish gloss varnish ready to install - can also be sanded and re-finished according to application needs

actual front end outer dimensions are approximately 31

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18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille RG66 Black-HP + Product Details Size –18" 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