Colorful ID rings are designed to distinguish different microphones. Made of high quality silicone, it's durable to use for long time. Features: 20 pieces of colored ID rings for handheld microphones, saving time and reducing errors. High quality silicone material, harmless and odorless, durable to use. Number 1 to 20, designed to distinguish different microphones. Soft and comfortable, not easy to deform after using. 2mm thickness, not easy to get broken. Note: Size and color may be slight different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Multicolor (Random Color) Quantity: 20 PCS Material: Silicone Number: 1 to 20 Package Size: 16 * 14 * 3cm / 6.30 * 5.51 * 1.18in Package Weight: 74g / 2.59oz Package List: 20 * Microphone ID Ring