The Riester duplex II is a high-quality newly designed stethoscope with precision double chest-piece. The acoustic performance has been considerably improved over previous models to offer maximum acoustic performance. 

• Double-headed chest-piece is made out of specially lightweight galvanized aluminium.
• 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 for instant low frequencies.
• Overall length: 77 cm.
• duplex is supplied with a pair of replacement ear-tips and a replacement membrane.
• Soft sealing silicon ear tips, with auto-rotation function, for consistently perfect fit and enhanced comfort. 
• Precision German quality at an exceptional price.