Regular inspections by the TÜV technical inspection board warrant that our quality assurance system to DIN ISO 9001:2015 is operative throughout the company. Its effectiveness is certified and the system is verified by annual review audits. As a result, the quality of our products is continuously monitored. A works inspection certificate 3.1 or production test log issued by an independent test lab will be sent to you free of charge on request. These documents provide information about the quality, grade and composition of the material we deliver.