Can be installed on any aluminum, steel, or resin tank! [Large capacity up to 7L! ] The capacity can be adjusted in 2 stages from 2.7 liters to a maximum of 7 liters using the flexible ZIP. [Clear top for maps] Clear top space for A5 size touring mapple, card pockets and space to store small items. [Built-in cushion material] There is a built-in cushion material inside the variable capacity storage space. *When storing digital devices, be sure to use a waterproof bag. [It can be used for a long time because it can be replaced! Replaceable suction cup] Since the suction cup is replaceable with screws, you can easily replace the suction cup that has become weak in suction. One large, thick suction cup with a diameter of 5 cm has a load capacity of 5 kg (smooth surface test) *This is the load capacity of the suction cup and does not indicate the load limit of the tank bag. Replaceable suction cup."NPB-2"