The BPF-3960-4100-L9 from COTS RF is a Band Pass Filter with Frequency 1910 to 6010 MHz, Bandwidth 4100 MHz @ 1 dB, Center Frequency 3960 MHz, Insertion Loss 1 dB, Rejection 30dB @ 1719 & 6611 MHz. Tags: Module with Connectors. More details for BPF-3960-4100-L9 can be seen below.