Index: CR39 1.56 1.61 1.67  

Diameter: 71mm 73mm 75mm 80mm  

Base: 200Base 300Base 400Base 500Base 600Base 800Base    

Center Thickness: 1.80mm 2.00mm 2.20mm    

Coating: UC/HC/HMC(AR)/REVO(MIRROR)    

Color: Grey, Brown, Green, Yellow, Pink, Purple, Blue, Red, Orange, etc.