The FDMA-297 from Metropole Products Inc. is a Diplexer with Frequency f1 243 to 270 MHz, Frequency f2 291 to 318.3 MHz, Power 100 W, Attenuation 45 to 80 dB, Attenuation f1 65 to 80 dB. Tags: Module with Connectors, Cavity. More details for FDMA-297 can be seen below.