28" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter Design – Rigid gauge ABS

Design – Rigid gauge ABS plastic

+ Product Details Size - 12"w X 18"h X 2"d (for duct opening measurement only)

6" width X 7

Designed for both wall and ceiling applications

These grilles and registers give you an extra measure of quality that are visible to your family members and house guests

28" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter Design – Rigid gauge ABS+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 18" OR 18" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 17. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum