The CLPFL-0900 from Crystek Corporation is a Low Pass RF Filter with Frequency DC to 900 MHz, Insertion Loss 0.06 to 0.87 dB, Rejection 1.96 to 49.01 dB, Power 4 W, Return Loss 11.96 to 33.28 dB. Tags: Connectorized, Butterworth Filter. More details for CLPFL-0900 can be seen below.