FIG. 1 is a left side elevational view of a back ferrule, the right side elevational, top plan, and bottom plan views being identical thereto;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a front elevational view thereof; and,
FIG. 4 is a cross-sectional view thereof, taken along the line 4-4 of FIG. 3.
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