The HFE-2.5-13 from ESJ Technology is a RF High Pass Filter with Frequency 2.5 to 13 GHz, Insertion Loss 1 dB, Rejection 50 dB, Lower Rejection 50 dB@DC to 2000 MHz, VSWR 2.00:1. Tags: Module with Connectors. More details for HFE-2.5-13 can be seen below.