Pre-filter

FIG. 1 is a perspective view of a pre-filter of the present invention;

FIG. 2 is a front view of the pre-filter of FIG. 1 ;

FIG. 3 is a rear view of the pre-filter of FIG. 1 ;

FIG. 4 is a left side view of the pre-filter of FIG. 1 ;

FIG. 5 is a right side view of the pre-filter of FIG. 1 ;

FIG. 6 is a top view of the pre-filter of FIG. 1 ; and,

FIG. 7 is a bottom view of the pre-filter of FIG. 1 .

The broken lines of FIGS. 1 - 7 depict portions of the pre-filter that form no part of the claimed design.