Given that the Thermomix® TM31 has never been sold in the United States, Vorwerk, LLC/Thermomix® USA is not able to service the TM31. Nevertheless, if you own a TM31 and have questions regarding the sealing ring, please visit the below link to be redirected to Vorwerk International Strecker & Co’s website for more information on how to operate your TM31 safe and secure.
https://thermomix.vorwerk.com/service/use-your-tm31-safe-secure/