The ornamental design for a posttensioncablepocket former, as shown and described.
FIG. 1 is a top perspective view of the embodiment of a post tension cable pocket former;
FIG. 2 is a bottom perspective view of the post tension cable pocket former of FIG. 1;
FIG. 3 is side view of the post tension cable pocket former of FIG. 1, as would be seen from any side of the post tension cable pocket former as the post tension cable pocket former is circular from top to bottom;
FIG. 4 is a bottom view of the post tension cable pocket former of FIG. 1;
FIG. 5 is a top view of the post tension cable pocket former of FIG. 1; and,
FIG. 6 is a cross-sectional view of the post tension cable pocket former of FIG. 1.