Multiple couplings or multi-couplings are used for comfortable and non-interchangeable coupling of several lines with only one coupling. We offer the multiple couplings as shut-off or non-shut-off. The couplings are suitable, for example, for non-interchangeable connection of machine modules or control cabinets. We recommend the use of special multiple hoses made of polyamide or polyurethane for the connections of the couplings.