CR39 RESIN LENS Reflective index: 1.50 ABBE: 58 Coating: UC, HC, HMC Diameter: 55, 60, 65, 70 AT monomer from Italy CR39 Optical RESIN LENSReflective index: 1.50ABBE: 58Coating: UC, HC, HMCDiameter: 55, 60, 65, 70AT Monomer from Italy can guarantee within 2 years can not become yellowCE AND ISO CERTIFICATIONWHITE ENVELOPE AND CUSTOMER DESIGN CR39 1.499 UC HC HMC (OPTICAL LENS)