Specification Brand : GSC International Label : GSC International Manufacturer : GSC International PackageDimensions_Weight : 4.00 PackageDimensions : L:16.00 X W:14.00 X H:13.00 PartNumber : 1863 ProductGroup : BISS Basic ProductTypeName : SCIENCE_FUNDAMENTALS_KIT Publisher : GSC International Size : 1/2" height x 3/8" top x 9/32" bottom SmallImage_Height : 57 SmallImage_URL : https://m.media-amazon.com/images/I/41LDOGfhUfL._SL75_.jpg SmallImage_Width : 75 Studio : GSC International Title : GSC International Molecular Model Deluxe. with 520 Pieces That Include 245 Atoms, 125 Hydrogen Atoms with Connected Bonds, and 150 Additional Bonds. Weight : 4 WeightUnit : pounds