12x25x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 24.75) - 3 Pack 3" Round Duct Pipe + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 6" x 32" or 32" x 6" is the size for the duct opening measurement only

+ Product Details Size & Compatibilty - The 12" to 4" round metal pipe reducer & increaser 30 gauge is compatible with duct 12" to 4"

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Filter Size - 17

Actual Front End Outer Dimensions Are 12" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

12x25x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 24.75) 3 Pack 3" Round Duct Pipe + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 6" x 32" or 32" x 6" is the size for the duct opening measurement only + Product Details Size & Compatibilty The 12" to 4" round metal pipe reducer & increaser 30 gauge is compatible with duct 12" to 4"