Periodic checks for leaks in heat exchanger, chiller and condenser tubes maintain peak performance. The LD-2X2 is the quick, simple and accurate tool for tube leak detection. The LD-2X2 incorporates two compact guns. The guns are inserted into opposite ends of the tube to be checked and the tube pressurized. Built-in air pressure gauges monitor tube pressure. If the pressure drops, a tube leak is indicated. The Kit includes 2 guns, three seal sets for tubes 3/4", 7/8" and 1" O.D. Carrying Case.