The ZHSS-K21G+ from Mini Circuits is a RF High Pass Filter with Frequency 21 to 40 GHz, Insertion Loss 1 to 2.5 dB, Power 2 W, Rejection 20 to 80 dB, VSWR 2.0:1. Tags: Module with Connectors, Suspended Substrate Filter. More details for ZHSS-K21G+ can be seen below.