The BioPAT® Trace Bioreactor probe assembly 9-bellows KPC is an exclusive accessory for the dialysis probe (BPT0086) and is part of the BioPAT® Trace and Multi Trace system . It is a bellows with KPC port for mounting the dialysis probe on Biostat® STR®. It comes in a pack of 3 pieces and it is absolutly required for the functionality. Bioreactor probe assembly 9-bellows KPC can be used in Biostat® STR.