FIG. 1 is a perspective view showing the front, top and left sides of a plunger for specimen filtration device embodying the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a fragmented perspective view illustrating an upper portion of the device of FIG. 1, with a cap shown in an open position.