As a perfect replacement for your broken or lost bike computer sensor, our bike speedometer magnet is suitable for different specifications of the bicycle spoke, easy to install. Good assistant for bike training.Designed with many excellent characteristics, such as rustproof, high strength, wear resistance and sturdy, our bike speedometer magnet has a long lifespan. Practical and convenient in use.It is constructed of PVC material.The length of this product is 1.5cm and width is 1cm.This product is perfectly suitable for bike, MTB, road bike, bicycle, etc.Item Name: Speedometer MagnetMaterial: PVCFeatures: Ultralight, Rustproof, Simple InstallationSize Details:1.5cm x 1cm/0.59" x 0.39" (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 Speedometer Magnet