TC Flange Connector Collection NEST TC Flange Reducer collection is designed for connecting hoses to auxiliary equipment (such as temperature sensors and liquid level sensors) and for aseptic liquid handling processes (such as filters and culture bags). It is particularly suitable for high-load bioprocesses. The collection is available in two sizes: 3/4" and 3/2". It is compatible with hoses with inner diameters of 1/4", 3/8", 1/2", 3/4", and 1''.