The SUPERFIRE Bicycle Holder is designed for 18650 and 26650 battery flashlights. Note: The holder does not include a flashlight; it's for display only. Enhance functionality by pairing with a tripod for fishing or emergencies. Choose from 18650U or 26650U clips to accommodate different flashlight sizes. Easy installation on handlebars with diameters of 2.3cm or 3cm. Ensure compatibility with all flashlights from our brand. Upgrade your biking experience with our versatile and cost-effective solution.