The FLM4450-18F from Sumitomo Electric Device Innovations is a RF Transistor with Frequency 4.4 to 5.0 GHz, Power 42 to 43 dBm, Power(W) 15.85 to 19.95 W, P1dB 42 to 43 dBm, Power Gain (Gp) 8.5 to 9.5 dB. Tags: Flanged. More details for FLM4450-18F can be seen below.