The Aquatica Delta 3 Section Arm Set includes 3 section arm 1 inches ball to flat plate, 11 inches middle, 11 inches double ball, 3 clamps, all that is needed is the ball head adapter for your specific light or strobes. The typical Delta 3 strobe arm mimics the human arm, with shoulder, elbow and wrist joints, positioning the light where you want becomes as flexible as you can ever imagine it to be.