The KFF6505B from CTS Electronic Components is a Band Pass Filter with Frequency 1.79 to 1.81 GHz, Bandwidth 20 MHz, Insertion Loss Less than 2.3 dB, Rejection 40 to 43 dB, Power 2 to 20 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for KFF6505B can be seen below.