This is a set of a Phiten necklace and armbands. The armbands are titanium 50x: 20cm (there are a few scratches on the lettering). The necklace is 50cm long (It's made of a stretchy material, making it easy to put on and take off). Aqua-Titanium, based on water-soluble titanium technology, is incorporated into the necklace to promote relaxation. Aqua-Titanium is expected to relieve tension, suppress stress responses, and enhance natural healing abilities. The titanium fibers are said to be effective for shoulder and neck tension, and this Phiten necklace is also used by athletes and medalists! If you purchase other items together (if they can be shipped together), we will give you a 100 yen discount, so please let us know before you buy. Thank you for looking.