The CLPFL-2000 from Crystek Corporation is a Low Pass RF Filter with Frequency DC to 2000 MHz, Insertion Loss 0.02 to 0.62 dB, Rejection 0.60 to 41.12 dB, Power 4 W, Return Loss 13.88 to 34.28 dB. Tags: Connectorized, Butterworth Filter. More details for CLPFL-2000 can be seen below.