16x26x5 (16.13x25.75x4.88) MERV 8 Aftermarket Electro-Air Replacement Filter (2 Pack) Electro-Air Part # F825-0548 Fits Electro-Air model number SST14. Nominal size 16 x 26 x 5. Actual size 16 1/8 x 25 3/4 x 4 7/8. This is an aftermarket filter.