The AN18W5-xx from Atlantic Microwave is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 0-10, 12, 15, 20, 30, 40 dB, Power 5 W, Peak Power 500 W, Attenuation Accuracy ±0.3-1.5 dB. Tags: Module with Connectors. More details for AN18W5-xx can be seen below.