The most advanced Sprague available. The Cardio
Sprague has the features of a traditional Sprague, but with a unique cardiology styling. Featuring a two tubes-in one
design which provides extra crisp sound transmission, an interchangeable
zinc alloy metal bell and diaphragm assembly, snap-on rims and diaphragms,
two sizes of soft ear tips for added comfort, and a full accessory case. Lifetime Limited Warranty.