Specification Binding : Jewelry Brand : Gain Express Label : Gain Express Holdings Ltd Manufacturer : Gain Express Holdings Ltd Model : GL-01_2 PartNumber : GL-01_2 ProductGroup : Jewelry ProductTypeName : ART_SUPPLIES Publisher : Gain Express Holdings Ltd SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/414oCQbdePS._SL75_.jpg SmallImage_Width : 75 Studio : Gain Express Holdings Ltd Title : Refractive Index Oil 1ml Each 1.300 to 1.800 RI Range