The stainless steel 100mm iob probe cap seal is manufactured from 316l stainless steel and has a red-silicone sealing gasket with a 100mm blue polypropylene screw cap. The stainless steel probe cap seal has four accessory ports surrounding a centrally located internal impeller assembly. Two of these ports have a white silicone plug inside a threaded cap that acts as a compression fitting for probe insertion. The other ports accept accessories using the same silicone compression plugs and threaded caps. These compression plugs make it easy to adjust the insertion length of probes or straight tubes depending upon the working volume of the bioreactor flask. The stainless steel cap seal, stainless steel ptfe impeller and all fittings are steam autoclavable.