... coefficient of retroreflection for seven years,5. Series 983-10, 983-32, 983-326 and 983-72 meet or exceed all FMVSS 108 requirements ... , including DOT-C2 Certification Mark. Series 983-10,983-71,983-72 have the E-mark Certificate ECE 104 Approval ... security. 3M Reflective TAPE/3M Diamond Grade Conspicuity Markings Series 983