The ornamental design for a boxspiritlevelprofile, as shown and described.
FIG. 1 is a top perspective view of a box spirit level profile showing the top surface, the major front surface, and the left side surface, the front major surface depicting a longitudinal channel located at each of its upper and lower margins and co-extensive with its length, and two end caps, two bubble vials and cutouts shown in dashed lines and not forming part of the design;
FIG. 2 is a front elevation view of the box spirit level profile of FIG. 1, the rear elevation view being identical to the front elevation view; and,
FIG. 3 is a cross section view of the box spirit level profile of FIG. 1 taken along line III—III in FIG. 2.