Riester Duplex 2.0 Baby Stethoscope - Stainless Steel - Black The Duplex® 2.0 Stethoscope is a new and greatly improved model of the Duplex® Stethoscope. The binaural is chromium-plated. The Duplex 2.0 has an overall length of 74 cm and weighs 151 g with the aluminum Chest Piece and 97 g with the stainless steel Chest Piece.
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