Neoprene, for down tube battery contacts, black Used to cover the connection contacts on the frame when the battery is removed, protects against weather, freezing, dirt and damage Type Item Design Component protection Fastening Velcro Width 8.0 cm E-bike type special Features frost-resistant, dirt-repellent, durable Vehicle type Bicycle Main color black Height 5.0 cm Component Contacts Length 11.0 cm