WELCOME STROBEL SILICA SAND  On November 5th, Strobel Quartz Sand launched a cyber attack on parts of the IT infrastructure recognized. The affected systems were identified and isolated. The situation will continue to be worked on together with external experts. Due to the defensive measures, there are currently partial restrictions on the use of our services and IT infrastructure for customers and partners.  At present, Strobel Quartz Sand GmbH does not assume that further system areas need to be isolated. Apologies for any inconvenience caused we agree with all affected customers and partners. We will provide additional information about the incident as soon as we have new information.  Thank you for your understanding. The Board