The 9FS10-4520/U50-P/P from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 4486.05 to 4553.95 MHz, Bandwidth 67.9 MHz (1dB), Center Frequency 4520 MHz, Insertion Loss 2.47 dB, Upper Rejection 80 dB. Tags: Cavity Filter. More details for 9FS10-4520/U50-P/P can be seen below.