Thank you for your reply, because I saw on the Internet that tunze has a 900dc motor, but I can't find it recently, because I am a pure tunze dc module, and the protein machine is 9004dc, there are many, I want to use a separate tank as a preparation . In addition, between 2018-2020, I purchased the tunze equipment on the French website, and there have been some failures recently. I don't know if I should contact you for maintenance, or should I contact you in Germany? I am from Taiwan