Filter

FIG. 1 is a front perspective view of an embodiment of a filter;

FIG. 2 is a front view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings illustrate portions of the filter and form no part of the claim.