The CLPFL-1200 from Crystek Corporation is a Low Pass RF Filter with Frequency DC to 1200 MHz, Insertion Loss 0.07 to 1.21 dB, Rejection 3.57 to 44.43 dB, Power 4 W, Return Loss 8.48 to 42.72 dB. Tags: Connectorized, Butterworth Filter. More details for CLPFL-1200 can be seen below.