This set contains 510 components for the construction and testing of four realistic, fully functional, and precisely detailed industrial simulation models: High Bay Storage Rack System Robot, Gripper Robot, Pivoting Gripper Robot, Three Axis Robot. This kit includes sturdy fischertechnik aluminum struts to guarantee maximum stability for all four models. Also includes a full color printed construction booklet with detailed instructions for building all of the above models, as well as a multi-language activity book/ PDF on disc. Includes 2 Encoder Motors, 2 XS Motors, and 6 sensors. PLEASE NOTE: This set REQUIRES either the ROBOTICS TXT Controller (17073), ROBO Pro Software (17074), and either the fischertechnik Accu Set or Power Set (each sold separately). Comes packed in sturdy plastic Gratnell's storage box.