First initial sample is tested. Only if it meets the required quality criteria will volume production start. Our Team of technicans supervises production to rule out variations in the quality of our products . Prior to the shipment of customer orders random tests or 100 % checks ensure that only parts of the highest quality leave the warehouse .Our Expert technicians at the Shanghai test laboratory use special analysing methods complemented by quality tests carried out  by independent organizations , such as the German technical inspection organisation TUV