Air filter

Description

FIG. 1 is a perspective view of an air filter showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

Claims

The ornamental design for an air filter, as shown and described.