... 3)0.5mm writing line 4)Nontoxic, safe for medical use Medical marker:1) 0.5mm writing-line2) FDA registerd, ASTMD ... 4236 EN71 Certificate approved3) This Medical marker can be sterile & packed individually in sterile OPP bag4) ... , REACH, MSDS, FDA, TUV, SONCAP and so on . 6. surgical marker :Customer logo availableour companyproduct linesampleroom surgical/Medical Marker