18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 actual front end outer dimensions 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

actual front end outer dimensions are approximately 27 5/8" width X 36 5/8" height

this easy-to-install grille fits seamlessly into any standard return filter opening

much more than required 700 PSI for R410

actual front end outer dimensions are approximately 38 5/8" width X 26 5/8" height -

No Sharp Surface Edges

18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w32h32 actual front end outer dimensions 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP actual front end outer dimensions are approximately 27 5 8" width X 36 5 8" height this easy to install grille fits seamlessly into any standard return filter opening