I had this installed on a Cross Cub 110. The manufacturer is Motoboat BB, and the capacity is 50L. Since it was installed with a separate carrier, some of the bolts are not original. Only two wave-shaped plates were used, and the others are unused. The dimensions are: height 300mm, width 530mm, depth 390mm. The weight is 4.5kg, and the load capacity is 5.0kg. Two helmets can be stored, but it may be difficult depending on the helmet shape. I was able to fit two jet helmets without a problem. There are two keys. Please understand that this is a used item before purchasing. Thank you.