30" x 8" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 29.75 X 7.75] 3-Pack 18in diameter Included in the package are

Included in the package are a leveler

+ Product Details Size - 20"w X 8"h is the size for the duct opening measurement only

with actual outer dimensions of 38

Easy clean Healthy air flow for your HVAC system - noise free components

+ Product Details Size - 40"w X 6"h is the size for the duct opening measurement only

30" x 8" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 29.75 X 7.75] 3-Pack 18in diameter Included in the package are30" 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