Unless things have changed--there is a run kit for each application consisting of a coded canister needed for operation of the machine... back in the day Ed surmised the recurring revenue stream from the consumable would outpace machine sales revenue---discussed in this CC: http://www.getfilings.com/sec-filings/110609/MEDIZONE-INTERNATIONAL-INC_8-K/mzeiexchibit991forconfcall8k.htm