15-liter backpack, which you can attach to the upper part of the following boxes so that it is always at hand: OBK58A OBK58B OBKN58A OBKN58B DLM46A DLM46B DLM30A DLM30B ALA36APACK2 ALA36BPACK2 OBK48A OBK48B OBKN48A OBKN48B OBK37A OBK37B OBKN37A OBKN37B DLM36APACK2 DLM36BPACK2