Used to introduce medium aseptically into large spinner flasks with vertical sidearms. Fittings are comprised of a PET insert with a fluorocarbon O-Ring and a polypropylene sealing cap. Gas filters are PTFE, 0.2 µm porosity. The 316 stainless steel tubes are held in place by modified polyphenylene oxide thermoplastic nuts with integrated ferrules. The fittings are completely autoclavable.