Features: This innovative bicycles bells boasts a unique tire shape that rotating to produce a crisps, pleasant sound, ensuring safety during rides with its compact, portable form and daily waterproof feature. Crafted from durability silicone and PC materials with a high carbon alloys steel cores, this rotating bells offer light weight construction, easy installation, and reliability water resistance for enduring performances. Ideal for cyclists of various levels, including commuters, recreational riders, and biking enthusiasts, seeking a dependable bike bells for enhanced road awareness. Perfect for everyday commutes, weekends adventures, or rainy conditions, as its waterproofed keeps it functional in wet environments while adding a stylish touch. With its effortless setup and minimal weight, this tire bells delivers a clear rings every time, for worry without cycling journeys. Specifications: Color:Two Choices Dimension:47x59.5x35mm/1.85×2.34×1.37in Component:rubber + PC materials Package Includes: 1pc bicycles tire bells note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.