Tandem sub

[0001]FIG. 1 is a front perspective view of a tandem sub showing an embodiment of our new design;

[0002]FIG. 2 is a rear perspective view of the tandem sub of FIG. 1;

[0003]FIG. 3 is a top plan view of the tandem sub of FIG. 1;

[0004]FIG. 4 is a bottom plan view of the tandem sub of FIG. 1;

[0005]FIG. 5 is a left-side elevated view of the tandem sub of FIG. 1;

[0006]FIG. 6 is a right-side elevated view of the tandem sub of FIG. 1;

[0007]FIG. 7 is a front elevated view of the tandem sub of FIG. 1;

[0008]FIG. 8 is a rear elevated view of the tandem sub of FIG. 1;

[0009]FIG. 9 is a cross-section view of the tandem sub of FIG. 3 along line 9-9; and,

[0010]FIG. 10 is a cross-section view of the tandem sub of FIG. 3 along line 10-10.

[0011]The broken lines consisting of dashes show an environment that forms no part of the claimed design. The broken lines consisting of a double-dot/dash pattern show a boundary of the claimed design.