Duplex-A is the high-grade Riester quality stethoscope with precision double chest-piece. The acoustic performance has been considerably improved.

• Special membrane for perfect auscultation, Ø 48 mm, with particularly flat and soft non-chill rims for improved adaptation on the skin.
• Bell, Ø 36 mm.
• Overall length: 77 cm.
• Duplex-A is supplied with a pair of replacement ear-tips and a replacement membrane.