The DG-0018-4031 from Spectrum Elektrotechnik GmbH is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 40 dB, Power 0.5 to 2 W, Attenuation Accuracy 1 dB, Operating Temperature -54 to 125 Degree C. Tags: Module with Connectors. More details for DG-0018-4031 can be seen below.