The microArm is an adjustable articulating arm for attaching and positioning accessories onto your camera rig.The arm has 1/4" 20 male screws on each end. The complete articulating knob tightens with a single knob.Finished in anodized metal. long arms are 4" (8" full length) and short arms are 1.5" (3" full length).Weight: 243g/ 8.5oz