FIG. 1 is a front perspective view of a knob showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a front perspective view of the claimed portion in FIG. 1 shown in an illustrative environment.

The unshown bottom forms no part of the claimed design. The broken line showing of various regions, including the unshaded areas therein, is for illustrative purposes and forms no part of the claimed design.