The FMA-284TB from Metropole Products Inc. is a Diplexer with Frequency f1 243 to 270 MHz, Frequency f2 291 to 400 MHz, Power 100 W, Insertion loss 0.7 to 1.2 dB, Insertion loss f1 1.2 dB. Tags: Module with Connectors, Cavity. More details for FMA-284TB can be seen below.