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I'd like to inform you that King Kowok Optics Company is leading manufacturer and supplier of optical lens located in China mainland. Our main products are including aspheric lens, spheric lens, Fresnel lens, assembly lenses and so on with diameter ranging from *0mm to **0mm. If you have any inquiry regarding on optical lens, please feel free to contact us. We will try to satisfy you with good quaity and competitive price.