Description: Made of copper material, double circle, strong tension. Corrosion-resistant and quick to spring-back after opening. Perfect for use with lures, rigs and leaders, easy to attach to other components. Solid, high durability. This boilie bait ring is good companion for fishing. Specification: Material: Copper Size : Inner Diameter: 5mm/0.20inch; Outer Diameter: 6mm/2.36inch Package Includes: 50 Pieces Fishing Lure Split Rings