"Combines the acoustic response of a traditional bell and diaphragm into a convenient one-sided chestpiece. New gasketed diaphragm enables the scope to achieve multi-frequency response simply by altering pressure. Light pressure produces bell-type low frequency response. Firm pressure will produce diaphragm-type high frequency performance. New ovoid shaped chestpiece improves ergonomics. Chestpiece made from lightweight zinc alloy plated with an attractive satin finish. Non-chill diaphragm retaining rim for patient comfort. Large bore stainless steel binaurals in satin finish. Double leaf internal spring fixed at 15° angle for greater comfort. Reinforcing yoke molded into flexible 22\" PVC \"Y\" tubing. Adsoft™ deluxe PVC eartips in small and large size for the ultimate in wearing comfort and acoustic seal. Spare diaphragm included. Scope ID Tag included. Weighs 5.35 oz. Overall length 30.5\". Lifetime Warranty."