FIG. 1 is a perspective view showing the new design for an air filter;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a front view thereof; and,
FIG. 5 is a side view thereof.
The portions in the drawing views shown in broken lines form no part of the claimed design. In addition, the dot-dash-dot type broken lines shown in the drawing views define the boundaries of the claimed design and form no part of the claimed design.
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