Color: Green, Red, Orange, Blue, Silver, Yellow, Gray. Material: ABS. Size: 7.5 x 0.5 x 0.5 cm. Inner diameter: 1.8-2.5 mm. Outer diameter: 5 mm. Package includes 6 packs of reflective wheel spokes; each pack contains 12 pieces. Provides strong reflection when exposed to light. Easy to install and remove. Enhances the appearance of your bike wheels while adding functionality. Improves visibility for increased safety during nighttime and poor weather conditions. Available in multiple colors to customize the look of your bike. Fits most standard bike spokes. Please verify compatibility with your bike before purchasing. Note: Due to lighting effects, monitor brightness, and manual measurement, there may be slight variations in color and size between the image and the actual product.