The 603 features:

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 15º 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
Available in 12 striking colors for departmental coding or personal identification
Scope ID Tag included
Weighs 6.5 oz.
Overall length 31"
Lifetime Warranty

Sold Individually.