ADC 615 Adscope Professional Clinician Stethoscope features Adsoft threaded PVC ear tips for the ultimate in wearing comfort and acoustic seal…also features a multi-frequency gasketed diaphragm that combines the acoustic response of a traditional bell and diaphragm into a convenient one-sided chest piece. Light pressure will give you low bell-type frequency, firm pressure for diaphragm type high frequency…oversized oval-shaped chest piece enhances acoustic performance while improving ergonomics. The sculpted chest piece is made from zinc alloy plated with an attractive satin finish that has outstanding performance and rugged durability. The diaphragm is non-chill for patient comfort…..preowned and still in very good well cared for condition… please see all pictures….(6)