End Register Duct Boots - 10" X 6" X 7" Round End Center is Compatible with Duct 7" 4" Diameter + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 22"w X 12"h pleated MERV 8 filter for HVAC return filter grille - 3 Pack

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening)

actual front end outer dimensions are 31

Replaceable Keys: The included keys are replaceable for your peace of mind

+ Product Details Size – 5" round duct sheet metal elbow - 30 gauge galvanized - crimped end connection - adjustable from 5° - 90°

End Register Duct Boots 10" X 6" X 7" Round End Center is Compatible with Duct 7" 4" Diameter + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 22"w X 12"h pleated MERV 8 filter for HVAC return filter grille 3 Pack + Product Details Perfect Fit & Easy Sizing Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening)