Flat-convex Silicon Lens 1), Brand: HENGXIANG 2), Material: Silicon 3), N=0.5 , B=40/20 , C=0.01 Flat-convex ... highest): N=2 , N=0.5 , B=40/20 , C=0.01 7),Specification: In accordance with the drawing, you can provide ... parameters, then we will design the drawing and customize this lens for you.8),Output: 100K/month 9),Pictures10) Main ... ) More information, welcome to visit: www.shhxgd.com optical lens