Product Name: Cr39 Single Vision and Bifocal Lens (Semi-Finished)Model Number: WX09Place of Origin: ChinaCr39 ND=1.499 semifinished lens for single vision 65mm: 1) B: 0-6 x 6mm, USD0.95 2) B: 8-10 x 6mm 3) B: 0-6 x 8mm 4) B: 8-10 x 8mm 70mm 1) B: 0-6 x 6mm 2) B: 8-10 x 6mm 3) B: 0-6 x 8mmm 4) B: 8-10 x 8mm Cr39 lens, ND=1.499 round bifocal semifinished lens 70/28mm: 1) B: 0-6 x 8mm 2) B: 8-10 x 8mm Cr-39 lens, ND=1.499 flat-top bifocal semifinished lens 70/28mm 1) B: 0-6 x 8mm 2) B: 8-10 x 8mm