Robotic articulated arms can be found in factories all over the world. This model uses a battery of independent hydraulic circuits to provide absolute control over the arm pincers ... grip, lift, twist, lower and release. Integrate the arm into other construction sets while learning the basics of hydraulics and robotics. Model size (mm): 200 x 600 x 340 Made of sturdy pre-cut plywood with an MDF base it is easy to assemble and designed to give our budding engineers a start.