Chromium stainless steel alloy. 
Diamond drawn to obtain highly resistant and stainless levelled surfaces. Suitable for all orthodontic applications.
BIOSTEEL® ROUND SPRING HARD WIRE NICKEL-FREE*Stainless steel alloy purposely made to prevent any nickel allergic reactions (Cr 16,5%, Mn 11%, Mo 2,7%, N 0,5%, balance Fe).Suitable for all orthodontic applications.