Company SEED Co., Ltd. DK Value 60×10(-11)(cm2/sec)・[mLO2/(mL×mmHg)] Power +25.00 D to -25.00 D (0.25 D steps) Diameter (mm.) 7.5 to 10.0 Base Curve (mm.) 5.00 to 9.00 Center Thickness (mm.) 0.17mm @(-3.00 D) Colors Blue