Features: Experience safety with the Bike Bells, feature a loud sound output of 110dB, ensuring your presences is known even in bustling environment. Craft from aluminum, this Bike Bells boasts rustproof properties, ensures smooth operate. For both kids and adults, this bike Bells is perfect for cycling enthusiasts ranging from beginner to riders, fitting handlebars between 22.2-31.8 mm. Whether you're commuting through street, exploring mountain trail, or enjoy a ride, the Bike Bells enhances your cycling experience with added safety and enjoyment. Easy installation is guaranteed, while washers ensure stability, making it a reliable tool for road bikes, mountain bikes, and adventure. Specifications: Component: Aluminum Sound: 110db Fit Handlebar Diameter: 22.2mm, 25.4mm, 31.8mm Size: About. 47mm/1.85in Include: 1pc Bells, 2pcs Gasket, 1pc Wrench, 1pc Manual Package Includes: 1pc Bells 2pcs Gasket 1pc Wrench 1pc Manual note: Trackers NOT Include. Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.