With a Cold-Shot, you don't have to drain water lines, sprinkler systems, or hot water systems before cutting pipe or tubing. It keeps a fully pressurized system operating while you make repairs. The Cold-Shot freezes liquids in steel, copper, cast iron, aluminum and plastic pipes ranging from 1/8'' through 2'' (10 to 60mm) using carbon dioxide (CO2). Dip tube-type CO2 cylinders are available from any welding supply house. The Cold-Shot works faster than ''refrigerator-type'' units, is more compact and less expensive. It's faster and uses less CO2 than ''bag-type'' pipe freezers, because the freeze head makes a better seal around the pipe. In five minutes you're ready to go to work on 1/2'' copper tubing, and just three minutes for cast iron pipe. The Cold-Shot is easy to use. Just place the freeze head around the pipe, attach the hose, and open the cylinder valve. Liquid carbon dioxide will flow into the freeze head and form dry ice with a temperature of minus 110F deg (-79C deg). That's cold enough to form an ice pack that can withstand 7,000 psi, yet won't damage pipes. Kit includes 10 sets of freeze heads for 1/8'' to 2'' lines (10mm to 60mm), two high pressure spiral hoses with injectors, T-distributor, locking nut, hex head screwdriver, rubber gloves, goggles and carrying case.