The CBP-1598AF+ from Mini Circuits is a Band Pass Filter with Frequency 1505.5 to 1690.5 MHz, Center Frequency 1598 MHz, Insertion Loss 1.8 to 3.0 dB, Power 10 W, VSWR 1.50:1, 1.90:1. Tags: Surface Mount, Ceramic Filter. More details for CBP-1598AF+ can be seen below.