The RIDGID 34318 42 mm Pipe Guide is suitable for use with the SeeSnake microDrain and can fit a 22 mm camera. The ball guide is designed to help center the camera in pipes, keeping the camera clear of bottom sludge in the pipe. By bringing the camera head closer to the center of the pipe, the pipe guide improves picture quality, allowing the camera to see equally in all directions and helping to keep the camera lens clear during inspections.