Material: Silicone Size: 8.5*3.6*3.2cm / 3.3*1.4*1.2" Color: Black Features: 1. Lightweight design does not affect bike appearance or add riding burden. 2. Compatible with Bairton, Garmin, and Magene devices. 3. Install on the non-drive side by pressing the flat side of the pedal to the inner crank. Secure the belt around the crank and tighten to attach the pedal sensor. 4. Durable silicone protective cover for bicycle cadence sensor. Stretchable up to twice its size. Helps protect against dust and debris. Note: 1. Colors may vary slightly due to differences in monitor displays. 2. If you have questions about sizing, please for guidance. Recommendations are for reference only. 3. Mixed sizes, colors, and items are accepted. Volume discounts available. Package includes: 1 x Cadence sensor cover