Knob and bezel

FIG. 1 is a perspective view of a cooktop showing the ornamental design for a knob and bezel for a cooktop according to the present invention;

FIG. 2 is an enlarged perspective view of the knob and bezel shown in FIG. 1;

FIG. 3 is a top plan view of the knob and bezel shown in FIGS. 1 and 2;

FIG. 4 is a front view of the knob and bezel structures shown in FIGS. 1-3;

FIG. 5 is a right side view of the knob and bezel shown in FIGS. 1-4, and is a typical, mirror image of a left side view; and,

FIG. 6 is a bottom view of the knob and bezel shown in FIGS. 1-5.

The broken line showing of the cooktop in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.