New. (1 pack of 3 blocks) Permanently removes both moisture and odor from hearing instruments. The Dry-Brik II replaces the original Dry-Brik. For use with either the Professional model or the Global model or the Zephyr. The shelf-life of an unopened Dry-Brik is about a year and a half. IMPORTANT: New version does not have copper strip on top for older Professional units with serial numbers prior to DSG119426. Additional Details ------------------------------ Package quantity: 1