DESC: One of our most popular acoustic scopes, the 603 combines outstanding acoustic performance with rugged durability. Combination adult size chestpiece precisely machined to exacting tolerances from surgical stainless steel. Extra large bell (1-3/8" diameter) for unsurpassed low frequency response and ultra-sensitive diaphragm (1-7/8" 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 degree angle for greater comfort and reinforcing yoke molded into flexible 22" PVC y-tubing. Adsoft deluxe PVC eartips (small and large) for the ultimate in wearing comfort and acoustic seal. Spare diaphragm and scope ID tag included. Weighs 6.5 oz, overall length 31". Lifetime warranty.