1.It is used to repair and assemble batteries pack 2. people who are familiar with battery performance and have practical experience in battery assembly. The appearance and color of products with different batches, which will not affect the use Color: Random Color ('t accept the specified color.) Material: plastic Package Contents: 1 x Lithium battery box material KIT Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.