Stainless steel chestpiece and binaurals designed for optimal weight and durability. Dual-channel PVC tubing provides separate sound pathways to each ear. Triple-leaf binaural spring encased in polyurethane permits size adjustment while preventing breakage. Ten year warranty.- Accessory Kit, Black, Includes a Pediatric Diaphragm, Bell Ring & 3 Additional Set of Eartips (US Only) 14-21 Days