The Riester Tristar 3 Head Stethoscope, model 4091 has a double chest-pieces for duplex, duplex baby and duplex neonatal made of aluminium with practical rapid-exchange connector.
Special membranes,  48 mm, 36 mm, 28 mm, for first-class acoustics.
Particularly flat and soft non-chill rims for improved adaptation on the skin.
Bells  36 mm, 28 mm, 24 mm.
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 length: 79 cm, 78.5 cm, 78 cm.
Latex-free.
Tristar is supplied with two pairs of replacement ear-tips, a replacement membrane each and a name plate.