I have been asked by the council today to prove that the needles I am using has the no back flow membrane. I have the Barberdts needles and the Cheyenne needles. Is it possible to find anything to support these are safe please?
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Hi Natalie, there is a document from Cheyenne that describes and confirms the safety of the needles. You can find it here. The Barber DTS cartridges follow the same principles and are also equipped with a safety membrane that complies with the specifications.
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