Surgical Stainless Steel Medical ID Plaque with ASTHMA pre-engraved on the front. Fits on any of our interchangeable MEDI KIDS STRAP or MEDI FAUX LEATHER STRAP. Plaque sold separately. Made of 316L Surgical Stainless Steel. Most medical bracelets on the internet are usually 304 Stainless. Although both are hypoallergenic 316L is non-corrosive. It is also known as "marine grade" stainless steel due to its increased resistance to chloride corrosion compared to type 304. No engraving, ships immediately. No engraving, ships immediately.