The FA-48A from Metropole Products Inc. is a Diplexer with Frequency f1 243 to 270 MHz, Frequency f2 291 to 318.3 MHz, Power 250 W, Attenuation 85 to 95 dB, Attenuation f1 90 to 95 dB. Tags: Module with Connectors, Cavity. More details for FA-48A can be seen below.