1.magnifying lens:5 inch 2.optical power:3 D/ ... electronic,medical,beauty care,jewellery,laboratories,schools,hospitals and optical industries.And they are also useful for artists,craftsmen, ... our own patents.Our magnifying lamps have passed CE,ROHS,GS,EMC,ETL and SAA certifications.Our products ... our own patents.Our magnifying lamps have passed CE,ROHS,GS,EMC,ETL and SAA certifications.Our products ...