Flat-convex Silicon Lens 1), Brand: HENGXIANG 2), Material: Silicon 3), N=0.5 , B ... convex, flat, etc.4),Specification: Φ6-Φ22 5),Center thickness: 1.5-2.5mm6), Precision (the highest): N=2 , N=0 ... parameters, then we will design the drawing and customize this lens for you.8),Output: 100K/month 9),Pictures10) Main ... Certificates: 12) More information, welcome to visit: www.shhxgd.com optical lens