The FB-RC80DF four-wheel-drive robotic crawler from Forbest Products is designed to inspect pipe from 3 1/8 to 19 5/8 inches with three sizes of tires (1 1/2-, 2 1/2- and 3 1/2-inch). Made of brass and aluminum, it can move back and forth with a meter counter sensor at about 42 feet per minute. The waterproof crawler works at minus 4 to 131 degrees Fahrenheit. It works with a Forbest 360-/180-degree pan-tilt waterproof high-resolution color camera head to allow users to have panoramic pictures with remote directional control. 877/369-1199; www.forbestusa.net.