Handcrafted Since 1971 | Lifetime Warranty | Free-Parts-for-Life Program | Latex Free. Typically used for aerospace and surgical applications, titanium is 2X as strong as aluminum and 45% lighter than steel! Constructed completely in titanium for its high-strength to low-weight ratio, biocompatibility, non-toxicity, and highly corrosion-resistant properties, the MD One Epoch is super light-weight, exceptional in performance, and remains rust-free for year after year of clear. Adult and Pediatric Convertible Chestpiece: The patented adult and pediatric convertible titanium dual-head. User can quickly switch from adult or pediatric configurations. Ergonomax headset and Safetylock: Hand polished, pre-angled titanium alloy headset. Tubing: Constructed of thicker, latex-free PVC. Included Accessories: 1 pediatric diaphragm with attachment, 1 pediatric bell with attachment, 1 adult bell with attachment and carrying clip, 2 extra sets of ComfortSeal eartips in varying sizes and 1 ID tag.