25" x 25" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 24.75 X 24.75] 3-Pack Compatible With Duct 10in Size - 10"w X 10"h

Size - 10"w X 10"h is the size for the duct opening measurement only

helping to maintain consistent temperature settings

+ Product Details Size – 18"w X 30"h or 30" x 18" is the size for the duct opening measurement only

Crafted from a blend of cotton and synthetic fibers

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 6

25" x 25" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 24.75 X 24.75] 3-Pack Compatible With Duct 10in Size - 10"w X 10"h25" x 25" Pleated MERV 8 Filter for HVAC Return Filter Grille 3 Pack Actual Dimensions: 24. 75" X 24. 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