The ornamental design for a louver unit for a tractor cab, as shown and described.
Description:
FIG. 1 is a rear perspective view of a louver unit for a tractor cab showing my new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a sectional view taken along section line 4--4 on FIG. 2; and
FIG. 5 is a rear elevational view of FIG. 2.
The broken line illustration of the tractor in FIG. 1 indicating the association of the components with the tractor is for illustrative purposes only and forms no part of the invention.
