ELECTRO-AIR 16x25 Old/Defective Electronic Air Cleaner to Filter Size 15 3/8" x 25 1/2" x 5 1/4." Case of 3This Filter Replaces the 2 Cells in the 16 x 25 ELECTRO AIR Electronic Air Cleaners Actual Size of Filter is 15 3 8" x 25 1 2" x 5 1 4" To Convert from Electronic Air Cleaner to Media Air Cleaner, you will need to turn Power Switch Off for the Electronic Air Cleaner permanently and remove the 2 Cells, we highly recommend disconnecting electrical power to Air Cleaner using a qualified Technician You may need to remove plastic tab at bottom of Air