This is the "Gadgetable" backpack from ace.(エース). Ace Gene CORDURA Two-compartment, B4 size, 2-way. No shoulder strap. It may not have come with one originally. Color: Black It has been used, as it was received from someone else. Please check the photos. The model number may be 55531, but it is unknown as there is no tag. 【Capacity】 ・16 liters ・B4 files, A4 also supported ・15.6-inch PC compatible ・Height 43 x Width 30 x Thickness 10 cm 【Condition】 The exterior has some signs of use. The interior may appear dirty to some people.