The Stainless Steel Polished (Also known as Marine or Surgical Stainless Steel -Grade 316- which is the highest grade of Stainless Steel) Woef Bone Tag allows up to Two (2) Lines of Emergency Identification Information on the front and the same on the back. Laser Engraving ensures durability in the harshest conditions and will not rub off or discolour. This Woef Bone Tag will speak on your Woef’s behalf, as only their owners can hear and understand them. Three Sizes are available, Small (30mm), Medium (40mm) and Big (47mm).