16x25x4 Electrostatic Washable Furnace and Ac Filter 15 1/2 x 24 1/2 x 3 3/4 Replaces 16x25x4 disposable media air filters Actual size: 15 1/2 x 24 1/2 x 3 3/4 Electrostatic, Washable, Permanent Filter Non-Rusting Stainless Frame, Lifetime Warranty 100s+ Sizes available - see our other listings