30" x 8" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 29.75 X 7.75] 3-Pack Filter Grille Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 4" duct openings

Actual Filter Size – 9 3/4"w x 7 3/4" x 1"

Filter Size - 21

+PSI Chart Our copper coils are engineered with an exceptional PSI burst pressure

30" x 8" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 29.75 X 7.75] 3-Pack Filter Grille Ideal for Walls & Ceilings:30" x 8" Pleated MERV 8 Filter for HVAC Return Filter Grille 3 Pack Actual Dimensions: 29. 75" X 7. 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