The BFCV-4085+ from Mini Circuits is a Band Pass Filter with Frequency 3130 to 5040 MHz, Center Frequency 4085 MHz, Insertion Loss 1.5 to 4 dB, Upper Rejection 14 to 20 dB, Lower Rejection 15 to 17 dB. Tags: Ceramic, Ceramic Filter. More details for BFCV-4085+ can be seen below.