My Identity Doctor - Pre-Engraved & Customized Blood Thinners Medical Alert Dog Tag Necklace, Stainless Steel 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 ON BLOOD THINNERS IMPORTANT: Check spelling, phone numbers & grammar when ordering. Cannot be changed or redone High quality hypoallergenic 1mm thick surgical 316L steel Chain: 22in/56cm, ID: 1.4in/3.5cm x .8in/2cm, Free ID card Incld