The ZLSS252-100W-S+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 2.5 GHz, Insertion Loss 0.2 to 0.4 dB, Rejection 20 to 90 dB, Return Loss 24 dB, Operating_Temperature -40°C to +85°C. Tags: Module with Connector, Suspended Substrate Filter. More details for ZLSS252-100W-S+ can be seen below.