The QMC-CRYOATT-20SMPM from Quantum Microwave is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 20 dB, Power 0.1 W, Cryogenic Temperature 10 mK, Attenuation Accuracy ±0.5 dB (Setting). Tags: Module with Connectors, Cryogenic Attenuator. More details for QMC-CRYOATT-20SMPM can be seen below.