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

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 18" duct openings

With a 4" diameter for the duct opening measurement

PREMIUM QUALITY - Our solid dryer vent pipe is made of high-quality 26-gauge galvanized sheet metal with crimped ends (snap-lock design) for easy fitting and secure connection

+ Product Details Size & Compatibility – The size of the side round ceiling box is 6" X 6" X 4" and it is compatible with duct 4"

+ Product Details Size - 32"w X 8"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 Brazing Solder Rods 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