The reference gauges are stored in a custom-build cabinet. Each gauge is clearly identified, documented and is inspected at least once every year. If it passes the test, it is equipped with a test stamp, indicating the period of validity.
		The gauges are inspected by means of a modern computer-based 3D measuring system.
		In order to ensure that all products are fully traceable, every box, whether large or small, is equipped with an operation card, containing all main specifications of the respective product.
		Each finished product is labelled with a product identification number consisting of a character and a number. Based on this code, all relevant data regarding manufracture and materials can be traced, even 10 years after production.