Combination adult size chestpiece precisely machined to exacting tolerances from surgical stainless steel for outstanding performance and rugged durability * Extra large bell (13/8 diameter) for unsurpassed low frequency response * Ultra-sensitive diaphragm (17/8 diameter) for greater amplification and crisper high frequency response * Color coordinated non-chill bell and diaphragm retaining rim for patient comfort * Stainless steel binaurals with 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) for the ultimate in wearing comfort and acoustic seal * Spare diaphragm included * Scope ID Tag included * Weighs 6.5 oz. * Overall length 31 * Lifetime Warranty *