Filter

FIG. 1 is a front view of a filter showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right-side elevation view thereof

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front, right side, top perspective view thereof;

FIG. 8 is a back, left side, top perspective view thereof; and,

FIG. 9 is a back, right side, bottom perspective view thereof.

The broken lines in the drawings show portions of the filter that form no part of the claimed design.