The XLR HD-7 Arm full size robot arm. 4 points of movement at bicep,elbow,wrist and claw. Made of PLA at a thickness of 40% infill this arm is ful of power! Arm comes ready for servos. 5 HD servos are recomended for best results. Dimensions 711.2mm x 101.6mm x 88.9mm Shoulder sold separately.