Black Plastic Grooved Ring Mandrel For Sizes 1 To 15 Black plastic mandrel with clear white markings etched in End-ring for easy hanging- hexagon shaped handle to keep from rolling Measures 12-1/2 inches long overall, with sizes 1 through 15 Groove is handy for measuring ring where the setting indents to get an accurate size Lightweight ring mandrel- only 1.9 ounces shipping weight