The 351-311-XXX from Broadwave Technologies is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 1 to 30 dB, Power 2 W, Peak Power 0.25 kW, Attenuation Accuracy ±0.3 dB, ±0.5 dB, ±0.75 dB. Tags: Module with Connectors. More details for 351-311-XXX can be seen below.