The AN18-xx from Atlantic Microwave is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 0-10, 12, 15, 20, 30, 40, 50, 60 dB, Power 2 W, Attenuation Accuracy ±0.3-1.5 dB, Operating Temperature -65 to 125 Degrees. Tags: Module with Connectors. More details for AN18-xx can be seen below.