buying cylinders

[1574aviad]

Are we allowed to use other companies' cylinders that have the same measures as the specified BIMBA or Parker cylinders?
Our local supplier has run out of BIMBA&Parker cylinders and won't be getting any of them in a 2 week period.
we called BIMBA USA and were told that if we order now, the delivery will arrive in about one week and the shipping would cost more than the cylinder itself.
For the time being we will be using the cylinders we bought, but we will be happy to find out whether we have to order special cylinders from the US.

Thanks in advance,
Aviad,Team #1574