The ZXLF-K252+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 2.5 GHz, Stopband Frequency 4.55 to 25 GHz, Insertion Loss 1.8 to 3.5 dB, Rejection 12 to 18 dB, Upper Rejection 12 to 18 dB @4550 to 25000 MHz. Tags: Module with Connector, Reflectionless Filter. More details for ZXLF-K252+ can be seen below.