Generous plating of metal surface with 5 microns of 18 karat gold polished to a brilliant shine. Ultra Sensitive Diaphragm for greater amplification. Color coordinated Non - Chill bell and Gold Plated Screw-on-Ring to retain diaphragm for patient comfort. Deluxe PVC ear tips for the ultimate in wearing comfort and acoustic seal. Includes Spare Diaphragm and ear tips. Single Lumen Tubing. Includes ID Tags. One year Warranty on finish, three year on Performance.