The ADC Diaphragm for Sprague Stethoscopes can be used to replace the adult or pediatric diaphragm on a variety of Sprague Stethoscopes. Warranty: 1 Year. Note: This is the replacement for the diaphragm only and does not include any other stethoscope accessories. Note: This item is available in either standard or retail display packaging. Features ADC Diaphragm for Sprague Stethoscopes Features Available in adult or pediatric sizes: Adult (#640-03) / Display Packaging (#640-03Q). Pediatric (#640-03S) / Display Packaging (#640-03SQ). This diaphragm retaining ring can replace the diaphragm retaining ring on the following ADC stethoscopes: ADC Proscope 640 Sprague Stethoscope. ADC Adscope 641 Sprague Stethoscope. ADC Adscope 647 Sprague-One Stethoscope. ADC Adscope 646ST Tactical Sprague Stethoscope. ADC Adscope 645 Gold Plated Sprague Stethoscope. Specifications ADC Diaphragm for Sprague Stethoscopes Specifications Diaphragm Diameter Adult: 1.5" (3.8 cm) Diaphragm Diameter Pediatric: 1" (2.54 cm). Diaphragm Material: PVC. Diaphragm Type: Standard. Media and Literature ADC Diaphragm for Sprague Stethoscopes Media and Literature ADC 2017 Product Catalog ADC Adscope Sprague Stethoscope Instructions for Use