Description: With high strength, stability and abrasion resistance, this bicycle stopwatch rack is resistant to deformation and can be used for a long time and has a lightweight design that does not take up much space. Shock-absorbing, anti-slip and impact resistant, this bike stopwatch rack will help you hold your stopwatch firmly in place and is easy to install and versatile. It is made of high-quality nylon and silicone material. The diameter of the stopwatch rack is 3cm. It is compatible for Bryton R320/R420/750. Item Name: Stopwatch Rack Material: Nylon, Silicone Features: High Strength, Good Toughness, Wear Resistant Size Details: Diameter: 3cm/1.18"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Stopwatch Rack 1 x Silicone Card Pad 2 x Large Silicone Straps 2 x Small Silicone Straps