Filter unit

Abstract

Claims

The ornamental design for a filter unit as shown and described.

Description

(1) FIG. 1 is a perspective view of a filter unit according to the design;

(2) FIG. 2 is a front elevation view thereof;

(3) FIG. 3 is a back elevation view thereof;

(4) FIG. 4 is a right side elevation view thereof;

(5) FIG. 5 is a left side elevation view thereof;

(6) FIG. 6 is a top plan view thereof; and,

(7) FIG. 7 is a bottom plan view thereof.

(8) The portions of the article shown in broken line form no part of the claimed design.