Worldwide and meanwhile proven a million times in practice, ERKA. has been setting the standard in blood pressure measurement with the Perfect Aneroid for decades. The prerequisite for the unique success is the ERKA. Quality Check: Already during production, each individual Perfect Aneroid undergoes no less than 49 quality and functional checks - including a final computer-controlled 100% final inspection. In this way we guarantee that the user has the best possible blood pressure monitor for his professional activity in his hands. Nothing less is our claim in our daily work. 1_ The membrane-protecting double tube technology guarantees a maximum service life with daily use. 2 The use of a specially hardened copper-beryllium diaphragm ensures a long service life while maintaining the high precision of the measuring instrument. 3 The sensitive screw drain valve allows the user to measure perfectly. 4 The instrument is available in both right-handed and left-handed models. 5 The choice of ERKA. GREEN CUFF cuffs is complete. They are durable, skin-friendly, biocompatible and stand for maximum wearing comfort. 6 Additional free XXL warranty of 5 years.