The ASM18-xx from Atlantic Microwave is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 0-13, 20, 30 dB, Power 2 W, Attenuation Accuracy ±0.4-0.80 dB, Operating Temperature -65 to 125 Degrees. Tags: Module with Connectors. More details for ASM18-xx can be seen below.