The 351-319-XXX from Broadwave Technologies is a Fixed Attenuator with Frequency DC to 4 GHz, Attenuation 3 to 50 dB, Power 50 W, Peak Power 1 kW, Attenuation Accuracy ±0.75 dB, ±1 dB, ±1.8 dB. Tags: Module with Connectors. More details for 351-319-XXX can be seen below.