its a intercooler sprayer. theres no size jets. it just sprays on your intercooler.

for picture click the link:
NX N tercooler Kit - Nitrous Express Intercooler Sprayers

note: that the kit with a 15 pound bottle is $430, and on ebay they're around $370-$420 thats with only 5-10 pound bottles. sooooooooo this is a deal.