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 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 Note: 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. Sold by-DIMEANI official store