generally,we do not sent cylinder sample to clients,cause it is inconvenient, By sea, mix loading, cost too long, by DHL, they take it as dangerous
if you the cylinder samples very much,and you pay for us for the express fee,and we send to you,while we will take the valve off,cause we can not send by express with the valve on
if you need a totally new sample,you need pay more,and the time is a little longer,about one month or more
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