High-Quality Construction: Our 21700 Battery Cell Battery Box features robust materials, ensuring durability and longevity for your electric bicycle battery needs. Versatile Compatibility: This Electric Bicycle Battery Box Shell is designed to accommodate voltage, 36v / 48v / 52v, making it ideal for different electric bike models. Efficient Design: The innovative design of the 21700 Battery Cell Battery Box allows for optimal space utilization while providing a secure fit for your batteries, enhancing overall performance. Easy Installation: User-friendly installation ensures that you can quickly set up your Electric Bicycle Battery Box without hassle, getting you back on the road in no time. Enhanced Safety Features: Equipped with advanced safety measures, this Battery Box guarantees protection for your 21700 cells, minimizing the risk of damage and ensuring safe operation for your electric bicycle. Colour:Black Material:ABS+PC Package Contents: 1PCS x Battery Box 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.