Detailed Product Description Our products that mainly used in the medical instrument, optical instrument, metallurgy, finance, photographic equipments, aviation, aerospace, instrument and meters, military as well as scientific research. descriptionA.CharacteristicTypeThickness(mm)A[2856k]D65ChemicalStability NDα×10-7 (/)Tg ()Ts()SxyYxyYDADWLB120.3280.59324.60.2680.58628.2131.524965355992.52LB220. ...