The QCFA4002 from Qualwave is a Fixed Attenuator with Frequency DC to 40 GHz, Attenuation 1 to 10 dB, 20 dB, 30 dB, Power 2 W, Peak Power 0.02 kW, Attenuation Accuracy ±1dB. Tags: Connectorized, Cryogenic Attenuator. More details for QCFA4002 can be seen below.