I claim the ornamental design for pair of floor boards, as shown and described.
FIG. 1 is a left perspective view of the pair of floor boards according to the present invention;
FIG. 2 is a right perspective view of the pair of floor boards thereof;
FIG. 3 is a top plan view of the pair of floor boards thereof; and
FIG. 4 is a bottom plan view of the pair of floor boards thereof;
FIG. 5 is an outer side elevation view of the pair of floor boards thereof;
FIG. 6 is an outer side elevation view of the pair of floor boards thereof;
FIG. 7 is an inner side elevation view of the pair of floor boards thereof; and,
FIG. 8 is an inner side elevation view of the pair of floor boards thereof.
The broken lines in FIGS. 1 and 2 represent a left and right side of a motorcycle, respectfully and in FIGS. 3 and 4 represent a connection of the pair of floor boards to a motorcycle. These broken lines are for the purpose of illustrating that the present invention could be secured to a motorcycle and form no part of the claimed design.