Dear Sirs,We need Optical Grating Lens, in chinese we called them Guang Shan Glasses,I not sure what you called them in your country. We need 230m2 This kind of lens, If you are from Ameria or Japan, and can provide me this kind of lens, please send us your quotation. We are A Gladen supplier in China, Please write to me soon. Email: Sincerely,Rina Show More