The QMC-CRYOIRF-004 from Quantum Microwave is a Low Pass RF Filter with Frequency DC to 10 GHz, Insertion Loss 5 dB, Return Loss 20 dB, Operating_Temperature 10 mK(-273.14 Degree C). Tags: Connectorized, Cryogenic Filter, Infrared Filter. More details for QMC-CRYOIRF-004 can be seen below.