The 311L-XX-20 from Innowave RF is a Fixed Attenuator with Frequency 600 MHz to 2.7 GHz, Attenuation 3 dB, 6 dB, 10 dB, 15 dB, 20 dB, 30 dB, 40 dB, Power 20 W, Weight 3.3 lbs, Attenuation Accuracy 0.5 to 1.5 dB. Tags: Module with Connectors. More details for 311L-XX-20 can be seen below.