Dumbbell

FIG. 1 is a front, right, top perspective view of a dumbbell, showing my new design;

FIG. 2 is a rear, left, bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front, right, top perspective view of its reduced scale in a detached state; and,

FIG. 10 is a rear, left, bottom perspective view of its reduced scale in a detached state.

The dashed broken lines in the figures are for the purposes of illustrating portions of the dumbbell and form no part of the claimed design.