Of rubber. Elastic rubber protective cover to cover the remote attached to the handlebar and small displays such as BOSCH Purion. Protects against bad weather, freezing, dirt and damage. Suitable for protection when parking the bicycle outdoors or during transport in the car. It is also ideal for the protection of the contact base in removable displays. Suitable for Bosch eBike, Shimano Steps, Yamaha eBike and other systems.