The HT-300A water well drilling rig is a model that offers a choice of tower heights. Both the A and B models are equipped with a Yuchai 85 kW engine, providing the machine with powerful output.The B model upgrades the tower from the A model to a 6.6-meter stroke, supporting drill pipes ranging from 1.5 to 6 meters, making it more versatile. Both models are equipped with a winch and a welder.