The 351-304-XXX from Broadwave Technologies is a Fixed Attenuator with Frequency DC to 4 GHz, Attenuation 3, 6, 10, 20, 30 and 40 dB, Power 30 W, Peak Power 1 kW, Attenuation Accuracy ±0.75 dB, ±1 dB. Tags: Module with Connectors. More details for 351-304-XXX can be seen below.