My Identity Doctor - Pre-Engraved & Customizable Blood Thinners Alert Medical ID Necklace BLACK EASY TO READ: #1 Recommended black engraving for yourlife safety with Warranty (see photos) CUSTOM & PRE-ENGRAVED: Customize ID before checkout. Also pre-engraved with BLOOD THINNERS IMPORTANT: Check spelling, phone numbers & grammar when ordering. Cannot be changed or redone High quality hypoallergenic 2mm thick surgical 316L steel Chain: 22in/55.9cm, ID: 1in/2.54cm x 1in/2.54cm, Free ID card Incld