Material: Metal + Rubber. Color: Black. Package: 2pcs of Battery Rubber Band Strap(Other accessories are not included). Size: As the picture show. Maximum stretched length: Approx. 25cm/9.84". Please attention: Due to manual measurement , there may be 0.1-0.3cm deviation exist,hope you can understand. Features: - Applicable for fix the battery of motorcycle or storage battery bike. - Fixed the battery so easy to prevent it from falling off, damping, greatly protect the battery. About color: There are slight difference between the picture and the real item caused by light brightness,hope you can understand.