FIG. 1 is a perspective view of an adjustable unit for a dual headed fixture showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image of the right side;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line representation of shower heads in FIG. 1 is for purposes of illustration only and forms no part of the claimed design.