If you already own a regulator and a Co2 tank these are the parts you are needing to make carbonated water at home. Most people use a 2 liter bottle (not included)

The Kit includes:
Stainless Steel Carbonation Cap
.5 Micron Carbonation Stone
Co2 Tank Wrench
Tubing for Carbonation stone .25 in
Duotight Fitting for Ball Lock
EvaBarrier Hose 3 ft
Gas Ball Lock Thread