The 450PBFN0040 to 1000, 450PBF0130, and 0150 type block-mount filters offer highly efficient filter media, capturing very fine particles over wide pressure ranges, high dirt holding capacity due to their large specific filter area, good chemical resistance, resistance to collapse during cold starts, filtration grades from 3 to 100 μm, standard mechanical-optical maintenance indicator, and optimized flow design aided by computerized 3D design.