The ZXHF-K581M+ from Mini Circuits is a RF High Pass Filter with Frequency 580 to 3000 MHz, Insertion Loss 1.7 to 2.5 dB, Power 1.58 W, Rejection 18 to 35 dB, Lower Rejection 18 to 35 dB @DC to 330 MHz. Tags: Module with Connectors, Reflectionless Filter. More details for ZXHF-K581M+ can be seen below.