Having acquired several HAMA storage of this type, I can testify that this is a high quality product sold at a price more attractive. The case measures approximately 22.5 x 18 x 16 cm and a weight of 1 Kg vacuum. The "sleeves included" are actually double transparent pockets numbered 60 in number. The supplied key allows to open all cases of the same model, but security is not essential for this kind of product; it is not by chance that we do not manufacture safe aluminum! An important point about this: the handle, the lock, hinges and edges of the case are metal, but instead, all side panels are made of a common plastic silver gray color. The term "aluminum case" is somewhat misleading, but less than 18, so do not expect too much!