36Pcs 18 Styles Zinc Alloy Key Clasps, Spring Gate Rings, Round Ring, Mixed ColorSize: Round Ring: 20x3.5mm, 7 Gauge, Inner Diameter: 13mm, 15 colors, 2pcs/color, 30pcs; O Rings: 20x3.5mm, Inner Diameter: 13mm, 2pcs; O Rings: 20x3.5mm, Inner Diameter: 12.5mm, 2 colors, 2pcs/color, 4pcs; Box: 7.4x7.2x1.7cm, 1pc.