16" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 18 5/8"] ceiling Design – Circular return valves RFG3024 Black HP const content item Hi-Lo Oval Stack Head

Design – Circular return valves - designed to be used in low and medium pressure ventilation air conditioning systems

actual front end outer dimensions are approximately 22 5/8" width X 27 5/8" height

+ Product Details Size - 10"w X 30"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 14 5/8" height

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16" X 16" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 18 5 8" X 18 5 8"] ceiling Design – Circular return valves RFG3024 Black HP const content item Hi Lo Oval Stack Head Design – Circular return valves designed to be used in low and medium pressure ventilation air conditioning systems actual front end outer dimensions are approximately 22 5 8" width X 27 5 8" height