Specification Brand : GSC International Color : Black Label : GSC International Manufacturer : GSC International MaterialType : Steel NumberOfItems : 1 PackageDimensions_Weight : 1.34 PackageDimensions : L:7.00 X W:7.00 X H:7.00 PartNumber : VBINR-2 ProductGroup : BISS Basic ProductTypeName : LAB_SUPPLY Publisher : GSC International Size : 1/2" height x 3/8" top x 9/32" bottom SmallImage_Height : 41 SmallImage_URL : https://m.media-amazon.com/images/I/41s-UPUfRRL._SL75_.jpg SmallImage_Width : 75 Studio : GSC International Title : GSC International VBINR-2 Variable Inertia Apparatus. for The Physical Science Classroom. Weight : 1.3 WeightUnit : pounds