Patent ID: 6986805

Claim:
A filter arrangement comprising: (a) a primary filter element comprising: a first, open end cap; a second end cap; and a media pack extending therebetween; (i) said first, open, end cap defining an internal radial seal region; and (ii) said second end cap having a central region including a recessed portion having an outermost dimension of at least 125 mm and a recess of at least 6 mm; (iii) said second end cap including a projection extending axially from a center of said central region; and (b) a safety filter element mounted in an interior of said primary filter element; (i) said safety element having an open end cap, a closed end cap, a region of filter media therebetween; (ii) said safety element closed end cap including a projection extending axially therefrom; and (iii) the safety element and primary element engaging to ensure axial alignment of the safety element.