The Parallax (GWS) Pico Servo is smaller and lighter than a standard servo, but it delivers the performance of a standard servo. It is recommended for smaller robots, or in projects where space is tight. Servos may be controlled directly from a BASIC Stamp I/O pin by using the PULSOUT command. Two Pico servos are used to make the Parallax Penguin Robot walk. Size: 22.0 mm x 11.24mm x 21.35 mm. Downloads and Resources: Information about Mini Servos (.pdf)