The TLLF-DC-300M-L3 from Talent Microwave Inc is a Low Pass RF Filter with Frequency DC to 300 MHz, Insertion Loss 1.2 dB, Rejection 50 dB, Upper Rejection >50dB@500MHz to 3Ghz, Power 2 W. Tags: Module with Connector. More details for TLLF-DC-300M-L3 can be seen below.