The FMA-223V 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 90 to 100 dB, Attenuation f1 90 to 100 dB. Tags: Module with Connectors, Cavity. More details for FMA-223V can be seen below.