psi plus
http://www.psiplus.us/
is an original manufacturer
of the tubular compressed gas cylinder
i own one of there 24oz CO2 tank
the big deferens between there tank and the other ones on the market is that there Du's not have a re-hide-row-test by date on it
this is because the tank is actually made to Handel ha-yer PSI then it experiences a being filled with 24oz of Co2
think of it as a big 9oz that hold over 2-times the gas
it is made of a chrome molly-alloy pics coming sown