The Geoprobe Model 7730DT is a high-capacity direct push machine with a durable undercarriage, hollow stem auger capabilities, and a wide-base platform. Features include: 77 in. stroke, two-speed probe cylinder, ground speed up to 4.5 mph, overhead mast and hydraulic winch, hydraulic liner extruder, 50-gallon onboard water storage, convenient sample preparation area. Innovative subsurface solutions from Geoprobe Systems. 1-800-GEOPROBE. Geoprobe Systems, Card No. 324