... EN166 , anti-scatch, not easy to be broken, bi-focal reader function Bi-focal Safety galsses&goggles1. material: polycarbonate2. meet ANSI Z87 ... color and coating available5. customer logo is available6. competitive price with good quality7. Reader power range: +1.0,+1.5,+2 ... .0,+2.5,+3.0 safety bi-focal glasses compliant with ANSI Z87.1 EN166 AS/NZS 1337