The CLPFL-0500 from Crystek Corporation is a Low Pass RF Filter with Frequency DC to 500 MHz, Insertion Loss 0.06 to 1.59 dB, Rejection 2.27 to 49.50 dB, Power 4 W, Return Loss 8.73 to 44.82 dB. Tags: Connectorized, Butterworth Filter. More details for CLPFL-0500 can be seen below.