The Pnexapod is a pneumatic version of a Stewart platform aka hexapod actuator. The six cylinders are 3/4" bore and 4" stroke with 1/4" tube press-in fittings. Both platform plates (1/8" 6061 aluminum) have a series of holes that can let you customize the orientation of the actuator. Also designed into the platform plates are mounting patterns for VexPro SMC 3-6 station base mounts and the CTRE Pneumatic Control Module (both not included). This actuator really can boost your robot with a total of 64 positions of movement.