as well as speed control

(see final picture in gallery) Measure while bending your elbow at 90 degrees and flexing

while flexing with your elbow bent at 90 degrees

choose "no hands"

Should roughly match your shirt size

CO2 Motion System Color:Black as well as speed controlModular, adjustable CO2 motion system. Use to make your own lightweight cape opener, mechanical wings, or special effects. Adjust angle of rotation, direction, and length of support linkages. Uses standard 16 gram or 25 gram threaded CO2 cartridge available worldwide. (not included) Aluminum and ABS construction. Linkages and adjustable arms CNC machined from aerospace grade aluminum. Stronger than electric servos of similar size and weight, each side