The XHF-581M+ from Mini Circuits is a RF High Pass Filter with Frequency 580 to 3800 MHz, Insertion Loss 0.6 to 2.1 dB, Power 1.58 W, Rejection 20 to 35 dB, Lower Rejection 20 to 35 dB @ DC to 330 MHz. Tags: Surface Mount, Reflectionless Filter. More details for XHF-581M+ can be seen below.