The ADC Proscope 664 Disposable Stethoscope 10/Pkg is a hybrid scope that combines a disposable chestpiece with traditional lightweight aluminum alloy headset. These stethoscopes come in a package of 10. Warranty: 1 Year. Features ADC Proscope 664 Disposable Stethoscope Features Diaphragm only disposable ABS chestpiece with non-chill rim for patient comfort. 22" PVC Y-tubing. Aluminum binaurals. May be ETO sterilized. Available in two different colors: Black 10/Pkg (#664BK). Yellow 10/Pkg (#664Y). Specifications ADC Proscope 664 Disposable Stethoscope Specifications Chestpiece Type: Diaphragm Only. Chestpiece Material: ABS. Chestpiece Finish: N/A. Chestpiece Weight: .16 oz (4.5 g). Diaphragm Diameter: 1.75" (4.45 cm). Diaphragm Material: PVC. Diaphragm Type: Standard. Headset Type: Lightweight. Headset Material: Aluminum. Headset Finish: Anodized. Tubing Length: 21" (53 cm). Total Length: 32" (81.25 cm). Total Weight: 2.5 oz (71 g). Literature ADC Proscope 664 Disposable Stethoscope Literature ADC 2017 Product Catalog