on the _40x10 cube. if you open up the gcode in a notepad type app, you will see this:
; generated by Slic3r 1.1.7 on 2015-01-16 at 10:43:58


; perimeters extrusion width = 0.40mm <<<<<<< ---- This is the one you are looking for this is for 1.75mm ABS on my hexagon .40 nozzle
; infill extrusion width = 0.67mm
; solid infill extrusion width = 0.67mm
; top infill extrusion width = 0.67mm