The ornamental design for a rear part of single drum roller, as shown and described.
FIG. 1 is a front right perspective view of a rear part of single drum roller showing our new design;
FIG. 2 is a right rear perspective view of the invention of FIG. 1;
FIG. 3 is a left rear perspective view of the invention of FIG. 1;
FIG. 4 is a front left perspective view of the invention of FIG. 1;
FIG. 5 is a right side elevation view of the invention of FIG. 1;
FIG. 6 is a left side elevation view of the invention of FIG. 1;
FIG. 7 is a front elevation view of the invention of FIG. 1;
FIG. 8 is a rear elevation view of the invention of FIG. 1;
FIG. 9 is a top plan view of the invention of FIG. 1; and,
FIG. 10 is a bottom plan view of the invention of FIG. 1.
The broken dash lines comprise claim boundaries. Neither the portions inside of the broken dash lines nor the broken dash lines themselves forms any part of the claimed invention.