The HFE-10-18 from ESJ Technology is a RF High Pass Filter with Frequency 10 to 18 GHz, Insertion Loss 1.2 dB, Rejection 50 dB, Lower Rejection 50 dB @DC to 8.5 GHz, VSWR 2.00:1. Tags: Module with Connectors. More details for HFE-10-18 can be seen below.