Riester® 4091, 4093

• Double chest-pieces for duplex, duplex baby and duplex neonatal stethoscope models - made of aluminum with practical rapid-exchange connector
• Bells: 0.9 inches (24 mm), 1.1 inch (28 mm), 1.4 inch (36 mm)
• Membranes: 1.1 inch (28 mm), 1.4 inch (36 mm), Approx. 2 inches (48 mm)
• 3 special membranes for first-class acoustics and three size bells (see specs tab)
• Particularly flat and soft non-chill rims for improved adaptation on the skin
• Matt chromium-plated binaural with integrated reinforced double-spring
• Optimal sealing of the external auditory canal with soft, replaceable ear-tips with metal screw thread
• Particularly strong Y-tube made of PVC for optimal acoustics to shield against undesired stray sounds
• Overall lengths: Approx. 31 inches (79 cm), Approx. 30.9 inches (78.5 cm), Approx. 30.7 inches (78 cm)
• Supplied with two pairs of replacement ear-tips, a replacement membrane each and a name plate
• Latex-free

• 2 year warranty

• Made in Germany

Riester Tristar Dual Head Stethoscope
Special membranes	1.1 inch (28 mm), 1.4 inch (36 mm), Approx. 2 inches (48 mm)
Bells	0.9 inches (24 mm), 1.1 inch (28 mm), 1.4 inch (36 mm)
Overall lengths	Approx. 31 inches (79 cm), Approx. 30.9 inches (78.5 cm), Approx. 30.7 inches (78 cm)
Includes	Two pairs of replacement ear-tips, replacement membrane each, name plate
Frequency analysis of duplex	20 Hz - 100 Hz max. 3.6 dB at 100 Hz / 100 Hz - 1,500 Hz max. 21.7 dB at 300 Hz
Frequency analysis of duplex baby	20 Hz - 100 Hz max. 3.85 dB at 100 Hz / 100 Hz - 1,500 Hz max. 14.3 dB at 300 Hz
Frequency analysis of duplex neonatal	20 Hz - 100 Hz max. 1.2 dB at 55 Hz / 100 Hz - 1,500 Hz max. 8.5 dB at 300 Hz

COLORS AVAILABLE:

Color	Part No.
Slate Gray	R-4091
Blue	R-4093