Ultravation DPFR16X25X5M11-DUL Merv 11 Replacement Filter, Pack Of 2 Ultravation has started rounding the dimensions on their 5 filters. These filters still fit the same&#44; Pre-applied gasketing on the assembled filter prevents air by-pass. 98&#37; efficient filtration media. High efficiency filter media collects small dust particles before they can collect on your coils. Superior frame strength utilizing double wall construction and die cut fingers.