The KFF6520A from CTS Electronic Components is a Band Pass Filter with Frequency 1.53 to 1.59 GHz, Bandwidth 60 MHz, Insertion Loss Less than 1.5 dB, Rejection 22 to 52 dB, Power 1 to 10 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for KFF6520A can be seen below.