These alloy rings are very small, smooth and seamless connectors between your leader and tippet. They make changing or replacing tippet easy without nibbling away at the leader, can be used on any leader system and are excellent for tying droppers. Outside diameter of 5/64 in. (2.0 mm) for light to medium leader or 3/32 (2.5 mm) for heavy leader and tippet. Single size packages have 10 rings. Assorted packages have 30 rings, 10 in each of 3 sizes: 5/64 in. (2.0 mm), 3/32 in. (2.5 mm) and 1/8 in. (3.0 mm). All sizes come strung together on a metal snap for security and easy handling.