2Pcs Elastic Lightweight Rubber O Rings for Headlamp Bike Bicycle LED light

description":"The best choice for bicycle light. Features: Rubber material, lightweight and portable. Soft and elastic, it can fix the lamp firmly. Easy to install on the bike. It is a nice tool for the bicycle light. Specifications: Material: Rubber Color: Black Item Length: 7cm / 2.76in, 5.7cm / 2.24in Item Weight: 6g / 0.21oz Package Size: 11.7 * 8 * 0.5cm / 4.61 * 3.15 * 0.20in Package Weight: 7g / 0.24oz Package List: 2 * Rubber O Rings