Outer diameter: approximately 11mm Inner diameter: approximately 8mm Thickness: approximately 1.4mm Size: 9 Made of copper Set of 100 Although new, these items have been stored in a home warehouse for a long time, so the product condition is listed as "Like new." The contents are clean, but please refrain from purchasing if you are sensitive to such matters, to avoid any problems. *I am also selling various other fishing tackle items. If you wish to purchase multiple items, please select the combined purchase option. Thank you very much.