The septum holder comes with one silicone rubber septum and serves as a versatile access port for both fluids and gases. Replacement septa are available. It is constructed from 316L stainless steel. 
It comes with a silicone O-ring measuring 20 x 2.0 mm.

The triple inlet port allows the bioreactor to be equipped with three addition ports (gas, acid, base, feed, anti-foam, etc.). This triple inlet is a simple way to increase the number of available inlets on the front plate. It comes with a silicone O-ring measuring 20 x 2.0 mm.