The most advanced Sprague available. The Clinical 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 eartips for added comfort, and a full accessory case. Available only from Prestige Medical. Lifetime Limited Warranty.