Support arm

FIG. 1 is a perspective view of my support arm;

FIG. 2 is a front elevational view of my support arm;

FIG. 3 is a rear elevational view of my support arm;

FIG. 4 is a left side elevational view of my support arm;

FIG. 5 is a right side elevational view of my support arm;

FIG. 6 is a top plan view of my support arm; and,

FIG. 7 is a bottom plan view of my support arm.

The recesses formed in the mounting plates shown in broken lines in FIGS. 1 , 2 and 3 form no part of the claimed design. Also, the ribbing shown in broken lines in FIGS. 4 , 5 and 7 forms no part of the claimed design. The circular features shown in broken lines in FIG. 7 forms no part of the claimed design. Further, the Allen wrenches attached to the mounting plates shown in broken lines in FIGS. 1 , 4 , 5 , 6 and 7 form no part of the claimed design.