Specification Binding : Misc. Brand : Century Spring Label : Century Spring Manufacturer : Century Spring MaterialType : Steel PackageDimensions_Weight : 1.00 PackageDimensions : L:7.00 X W:4.00 X H:3.00 PartNumber : C-161 ProductGroup : Home Improvement ProductTypeName : TOOLS Publisher : Century Spring SmallImage_Height : 63 SmallImage_URL : https://m.media-amazon.com/images/I/51bNcJF5nZL._SL75_.jpg SmallImage_Width : 75 Studio : Century Spring Title : Century Spring C-161 2-3/4" Extension Springs 7/16" OD 2 Count Weight : 1 WeightUnit : pounds