... single sterile package 3>conforms to CE&FDA test Surgical Skin Marker1> surgical skin marker, skin marker2> with a standard ruler ... Research and Doctor Use, marking on patients’ skins before surgical and skin disease treatments! Ink is nontoxic and nonirritant! ... ,air erasable marker,Textile marker,French curve rulers,Plasticrulers,Flexible curve Rulers,as showed below, SM10 Surgical Skin Marker