This fixture cannot have a BBW (back box) field installed. We do offer a replacement for this, but it is ONLY for one that had the BBW field installed and it has become damaged or missing and needs a replacement. It is NOT for installing a BBW onto a fixture that was not specified with one originally.
Back Box: DSXWBBW xxx U (replace xxx with finish)
Diffuse Drop Lens: DSXWDDL U