Lithium-Ion Battery-Powered Controller Cable Box For Electric Bicycles, By Vbest The plastic bosses in the outer cover that receive the cover screws are small and fragile, and the screw mounts will take up part of internal space, to avoid the screw splits them during installation, you need to use a smaller screw. Specification: Condition: 100% Brand New Item Type: Controller Box Material: Plastic Color: As Picture Shown Optional: S, M, L Package List:1 x Controller Box [PROTECTION]This controller box can provide good protection for your electric bicycle controller, dustproof and waterproof. [DURABLE EQUISITE]Made of quality material, fine workmanship, sturdy and durable, long life time. Fine craftsmanship, smooth and beautiful appearance. [EASY TO OPERATE]With screws and clamps, no other tools, very easy to install and operate. [PERFECT KIT FOR OUTDOOR]Wonderful accessory for your electric bicycles. The installation method is simple and easy to use. [3 SIZES]3 different sizes for you to choose, meet your different needs.