Navy Blue Two Tunable Diaphragms Conveniently Alternate Between Low And High Frequency Sounds Without The Need To Turn Over The Chestpiece Solid Stainless Steel Chestpiece 27 Tubing 2-in-1 Tube Design Eliminates Tube Rubbing Noise Excellent Acoustic Seal And Comfortable Fit With Patented Littmann Snap Tight Soft-sealing Eartips Comfortably Angled Anatomically Correct Headset Patient-friendly Nonchill Rim And Diaphragm 5 Year Warranty