The invention pertains to a cassette (2) comprising a product conveying path (1 1a 1b) and a positioning means (3a 3b) engageable with a counter piece on a centrifuge having a rotor for separating blood components or on a system component (4) arranged in a centrifuge. The positioning is effected such that a section of the product conveying path (1 1a 1b) is aligned with a section of the centrifuge or the system component arranged in the centrifuge. Furthermore a tube connected with bags is accommodated in the product conveying path (1 1a 1b).
