Medical Alert Key Chain Charm, "Diabetic", Stainless Steel. (Includes FREE Engraving) Diabetic medical alert, Heavy duty stainless steel construction, will not rust or tarnish, safe for water. Deep stamped custom inscribing. very easy to read will not scratch off or wear out Strong curb link chain and sister hook clasp that is adjustable down to fit more snugly. Customizable! 3 lines with 16 characters per line, stamped on the back. Made in and ships from U.S.A