The ornamental design for a dielectricholder for an air-lift bucket, as shown and described.
FIG. 1 is a front elevation view of a dielectric holder for an air-lift bucket showing my new design, each of the opposite rear side, the adjacent right side, and the adjacent left side being a mirror image of the shown;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is an isometric view thereof; and,
FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1.
The broken lines in FIG. 4 of the drawings depict an air-lift bucket as environmental subject matter only and form no part of the claimed design.