Order online or call us:  (954) 302-2508 | (954) 543-4224

(954) 302-2508 | (954) 543-4224



ADC™s legendary Sprague with stealth black chrome for a striking appearance.

The 646 features:

  • Threaded chestpiece drum permits the use of five interchangeable chestpiece fittings an adult and pediatric diaphragm, and three bells (11/4", 1", 3/4") – for complete diagnostic capability in most patients
  • All metal parts finished in black chrome for a striking appearance
  • Latex-free double tube configuration
  • Proprietary valve mechanism eliminates acoustic leakage
  • Adjustable binaurals
  • Complete with an accessory pouch containing the bell chestpieces, chestpiece key, 2 spare diaphragms, one pair of mushroom eartips, and one pair of silicon eartips
  • Weighs 8 oz., measures 30
  • Inspected and packaged in the U.S.A



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