The ornamental design for a syntheticresintube, as shown and described.
FIG. 1 is a top plan view of a synthetic resin tube showing my new design,
the tube being symmetrical about its axis and the pattern repeated
throughout the circumference of the tube;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is an end view thereof;
FIG. 4 is an end view thereof from the opposite end to that of FIG. 3; and
FIG. 5 is an enlarged top plan view of a portion of the tube as shown in
FIG. 1 taken about line 5--5.