The QMC-CRYOATT-30 from Quantum Microwave is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 30 dB, Power 0.1 W, Insertion Loss 0.5 dB. Tags: Module with Connectors, Cryogenic Attenuator. More details for QMC-CRYOATT-30 can be seen below.