ADC's exclusive design features an improved valve mechanism that virtually eliminates acoustic leakage and a chestpiece key to facilitate after market service.

The ADC Spragues features:

• Threaded chestpiece drum of chrome plated zinc permits the use of five interchangeable chestpiece fittings - an adult and pediatric disphragm, and three bells (1-1/4",1",1-3/4") - for complete diagnostic capability in most patients.
• Latexl-free, double tube configuration.
• Proprietary valve mechanism eliminates acoustic leakage.
• Adjustable chrome-plated brass 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.
• Inspected and packaged in the U.S.A.

Proscope 640 features:

• Traditional 16" tubing length in black only.
• Weighs 7 oz. / Overall length 24"
• One Year warranty

Adscope 641 features:

• Convenient 22" tubig length in choice of 24 fashion tubing colors.
• Weighs 8 oz. / OVerall length 30"
• 5 year warranty