Support arm

FIG. 1 is a rear perspective view of the design;

FIG. 2 is a front perspective view of FIG. 1 ;

FIG. 3 is a rear elevational view of FIG. 1 ;

FIG. 4 is a front elevational view of FIG. 1 ;

FIG. 5 is a left-side elevational view of FIG. 1 ;

FIG. 6 is a right-side elevational view of FIG. 1 ;

FIG. 7 is a top plan view of FIG. 1 ; and,

FIG. 8 is a bottom plan view of FIG. 1 .

The broken lines immediately adjacent the claim represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.