The FMA-297 from Metropole Products Inc. is a Diplexer with Frequency f1 243 to 270 MHz, Frequency f2 292 to 318 MHz, Power 100 W, Attenuation 50 to 90 dB, Attenuation f1 50 to 90 dB. Tags: Module with Connectors, Cavity. More details for FMA-297 can be seen below.