This (promotional) video shows the inner construction principle of our joints and the assembly of our arms. Enjoy. The given article numbers (in the film) are: 4 DOF arm “small”: RL-D-RBT-3322-AC 4 DOF arm “big”: RL-D-RBT-5532-AC 5 DOF arm “small”: RL-D-RBT-3322S-AC 5 DOF arm “big”: RL-D-RBT-5532S-AC Vote Up +0 Vote Down -0You already voted!