A classic design and superior acoustics make the Clinical Cardiology? the finest in auditory diagnostics. Incorporating a two tubes-in-one design for the clearest sound transmission and stainless steel construction, the Clinical Cardiology? uses the finest sound conducting design and materials available. The deep bell is shaped for optimum sound detection and comes with a wide non-chill ring. Each Clinical Cardiology offers two sizes of soft eartips which deliver sounds accurately by protecting the user from outside noise while providing unsurpassed comfort. A convenient snap-on rim and diaphragm compliment the advanced design and ease of use of the Clinical Cardiology?. Lifetime Limited Warranty.