30" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 32 5/8" X 26 5/8"] sidewall Tamper-Proof Security – Features a

Tamper-Proof Security – Features a robust design to prevent unauthorized access and protect your thermostat settings

our damper helps create a well-balanced indoor environment

+ Product Details Size – 24" x 24" with 14" collar T-Bar drop ceiling perforated return grill - metal back casing

actual front end outer dimensions are approximately 27 5/8" width X 20 5/8" height

All steel wire is applied between PET surfaces to prevent corrosion (oxidization)

30" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 32 5/8" X 26 5/8"] sidewall Tamper-Proof Security – Features a+ Product Details Size 30"w X 24"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32 5 8" width X 26 5 8" height Actual Filter Size 29 3 4"w x 23 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.